This video we are going to discuss the NUMBER data type. The Number data type is used to store integers, and real numbers. When you create a column as a NUMBER, you can store pretty huge or pretty small numbers in this column. Now there are two things you need to consider when working with numbers, and that is the precision as well as the how big the number is.
For example, we can store the number 9.9. This has two significant digits. We could also store the number 9.9 X 10^4. In this situation, the number is much larger, but the number of significant digits is the same. 9.9 are the significant digits. When we expand this out we just have 99000, and the zeros are just used for size and are not considered "significant" in this situation. In fact, you get a max precision of 38, but a maximum value of 9.99 * 10^125. You can also use this data type to store very small numbers. Check the docs for the specifics on maximums and minimums.
You can provide it with two pieces of information:
Precision - The total number of digits.
Scale - The number of digits to the right of the decimal.
You do it in this format: NUMBER (precision, scale).
The important thing to remember in this is that when you specify a precision, you will be limiting the max size of the numbers.
The secret behind this data type is that it is actually stored in scientific notation. That is we store a number and then we can multiply it by 10 raised to some power. This allows us to store much larger numbers without taking up a ton of space.
The oracle docs actually gives a formula that you can use to see how much storage is going to be required for a specific NUMBER data type.
How much precision can be used? The acceptable range is 1-38.
What about scale? The range is actually -84 to 127. I'll explain the scale in more detail in an upcoming video. That's because there is a lot of confusing things here…What does it mean for the scale to be negative? How can we have a scale that is bigger that the total number of digits available through the precision. That's a topic for another video.
It's important to understand that when we increase our scale, we decrease the max size of the number. For example if we have a precision of 5 and a scale of 3, the highest number we can store is 99.999. This is in contrast to a precision of 5 and a scale of 2 which allows for up to 99.999. Either way you get 5 significant digits, but the numbers of digits to the left and right of the decimal change.
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Views: 6886
Caleb Curry

Session 6:
Datatypes In Oracle
ALPHABET : A-Z , a-z
NUMBER : 0-9 (with precision and scale)
DATE / Temporal : any Date and time (Hours, Minutes, Seconds, Mili-seconds, Timestamp, Timezone etc)
Alphabet + Number = Alphanumeric Data
= String / CHARACTER Datatype Category
Number = Numeric Datatype Category
Date = Date Datatype Category
1. CHARACTER Datatype:
CHAR, VARCHAR, NCHAR:
CHAR is fixed length datatype and VARCHAR is Variable length datatype to store character data. i.e. A-Z , a-z , 0-9 , all keyboard characters etc.
The default size is 1 character and it can store maximum up to 2000 bytes.
Example : EName, EmpID, PassportNo, SSN, etc.
EName CHAR(10) := ‘TOM’; wastage of 7 space after the string
EName VARCHAR(10) := ‘TOM’; Spaces can be Reuse which left after the string
NCHAR additionally handles NLS(National Language Support).
Oracle supports a reliable Unicode datatype through NCHAR , NVARCHAR2 , and NCLOB
VARCHAR2, NVARCHAR2:
These are Variable length datatype.
VARCHAR2 handles alphanumeric character string whereas NVARCHAR2 handles alphanumeric character string with NLS(National Language Support).
The default size is 1 character and it can store maximum up to 4000 bytes.
LONG: Variable length string. (Maximum size: 2 GB - 1)
Only one LONG column is allowed per table.
RAW: Variable length binary string (Maximum size 2000 bytes)
LONG RAW: Variable length binary string (Maximum size 2GB)
2. NUMERIC Datatype:
NUMBER:
It stores Numeric values and performs numeric calculations.
NUMBER, NUMBER(n), NUMBER(p,s)
It stores Numbers up to 38 digits of precision.
SeqNo NUMBER; 1, 123, 12345678
EmpID NUMBER(4); 1, 123, 1234
Sal NUMBER(7,2); 23456.78 , 123.45 — correction in video: Sal NUMBER(a7,2); which is wrong please ignore.
1234567 can be a type of NUMBER, NUMBER(7), NUMBER(7,0)
It can store both integer and floating point numbers
NUMERIC(p,s)
FLOAT: Ex: EmpSal FLOAT; FLOAT(7) Decimal Points allowed
DEC(p,s), DECIMAL(p,s) , REAL, DOUBLE PRECISION
INTEGER: Ex: SSN INTEGER; Decimal Points are not allowed
INT, SMALLINT
3. DATE Datatype:
DATE:
It stores DATE(Date, Month, Year) and Time(Hour, Minute, Second, AM/PM) and performs calculations with such data.
Default DATE format in Oracle is “DD-MON-YY”
Based on "Gregorian calendar" where the date ranges from “JAN 1 4712 BC” to “DEC 31 9999 AD”
doj DATE; “18-MAR-2010 12:30:00 PM”
TIMESTAMP: It can store all parameters as DATE datatype and additionally it can have “Fraction of seconds” and
TIMESTAMP WITH TIMEZONE / TIMESTAMP WITHOUT TIMEZONE.
Range from 0-9 digits, the default size is 6.
4. LOB Datatype:
LOB: “Large Object” data.
It can store pictures, motion pictures, Textfiles etc.
CLOB: “Character Large Object” is used to store structured information like a text file with a specific file format.
BLOB: “Binary Large Object” is used to store Un-structured information like Image, JPEG files, MPEG files etc.
BFILE: “Binary File” is used to store the pointer to a specific file / Just store the location of a file.
Maximum size: (4 GB - 1) * DB_BLOCK_SIZE initialization parameter (8 TB to 128 TB)
Extra Information:
NCLOB : It supports all the character set supported by CLOB and additionally it handles NLS(National Language Support )
Maximum size: (4 GB - 1) * DB_BLOCK_SIZE initialization parameter (8 TB to 128 TB)
ROWID and UROWID(optional size) Datatype: contains fixed length Binary data.
BBBBBBB.RRRR.FFFFF combination of BLOCK-ROW-DATABASE FILE
Physical and Logical ROWID
Upcoming Session:
Session 7:
Populating Data into Tables(INSERT Statement):
Inserting data into all columns of a table
Inserting data into Required columns of a table
Inserting NULL value into a table
Inserting Special Values(USER / SYSDATE) into a table
Supplying data at runtime(using & and &&)
THANK YOU :)

Views: 57
Database Concepts Made Easy

The DECIMAL data type is similar to the INT data type in that when you use the number for math, it maintains precision. The difference though is obvious in the name. The DECIMAL data type allows for numbers after a decimal point (and before the decimal point). The DECIMAL data type allows us to store what is known as a fixed-point number. A fixed point number is a number that has a specific number of digits available to store numbers in. That means we can't do things like use a DECIMAL data type to store as many digits of PI as possible, because we can't store unlimited digits. We are limited to a certain number.
There are two keywords you need to understand when you are working with the DECIMAL data type, precision and scale. Precision is the number of digits and scale is the number of those digits that will come after the radix. You are going to want to provide these numbers when you declare a column of this data type.
For example, DECIMAL(5, 2) has a precision of 5 digits and a scale of 2 digits. That means we can store a maximum of two digits after the decimal and four digits total. This gives us a possible range from -999.99 to 999.99
The highest number of digits is 65, and the highest number of digits after the decimal is 30.
This data type is also known as DEC, NUMERIC, and FIXED.
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Caleb Curry

FLOAT and DOUBLE data types are data types that can be used to store numbers that can include decimal numbers. They are specifically used to store estimates. What do I mean? I mean that the precision of a FLOAT or DOUBLE value can be lost when doing math. The data types are only capable of maintaining a certain level of precision. The level of precision is usually adequate for most mathematical operations. If you need to store exact data, you will want to look into using the INT or DECIMAL data type instead.
The numbers stored in a FLOAT or DOUBLE column are called floating point numbers, we'll see why in just a moment.
Why are they called floating point numbers? let's look at a number. 150. This number could be represented as 150, or it could be represented as 1.5 * 10^2, or 1.5e2. With floating point numbers, scientific notation is used. These numbers are called floating point numbers because the decimal can float to different spots as we change the exponent.
This means that the data type needs to store the number, how many decimal the number needs moved, and a sign bit.
The benefit of floating point numbers is that they allow us to store pretty huge numbers. The down side is that they are not storing values exactly because they are limited in size. This means that only a certain level of precision is to be expected from a floating point data type.
If you remember from the video of DECIMAL, precision is the number of digits in a number. As long as the precision for one of these data types exceeds the need for your specific data, the data type can work fine. For example, if you are storing a number like 15 trillion, you don't have to worry as much with precision as your number does not contain a lot of digits. This number can be represented as 1.5 x 10^13. This is a lot different than trying to store 1.5534534534 x10^13.
Now we know both of these data types do not maintain a high number of digits correctly, but what is the difference between FLOAT and DOUBLE. The difference is the amount of storage they take up. Float takes up 4 bytes while DOUBLE takes up 8. The benefit in DOUBLE is that because it has more room to store data, it has a higher level of precision and can store bigger numbers.
Now, what level of precision can you expect from either of these? FLOAT around 7 and DOUBLE around 15. Now, these data types are obnoxious because the exact values depend on your operating system and in general these monsters cannot be trusted. Especially when you start doing math with different numbers. In general, it is recommended to use the DOUBLE data type to have a higher level of precision and calculations in MySQL are done with DOUBLE.
Always remember… prepare for trouble, make it double.
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Views: 6656
Caleb Curry

In the upcoming videos we are going to discuss data types in depth, but I don't want to drown you in all of the details. Because of that, I'm giving you this video which is going to introduce you to the most important data types. Then, in the upcoming videos, I'll describe them in more depth.
One of the data types we've already discussed in this video is NUMBER. This data type is used to, obviously, store a number. It can be used to store integers (whole numbers), or numbers with decimals. There are two other numeric data types you should know of.
BINARY_FLOAT and BINARY_DOUBLE are both numeric data types that are known as floating point numbers. A floating point number is often used for large numbers that have decimal places where it is acceptable to not be completely precise. What I mean by this is that these numbers can only store numbers correctly up to a certain decimal point. If you need perfect precision, you will want to use the NUMBER data type.
Now storing numbers is good sometimes, but occasionally you will want to store string data. String data can be any sequence of characters, including numbers. By telling the database that a column is a string data type, the database knows how to treat that column. There are four important string data types that you need to know about.
The first two are CHAR and NCHAR. These data types are used to store a fixed-length string. So for example, you can say you want to store 12 characters. This means that every value for this column will be exactly 12 characters. If you insert less than 12 characters, the data will be padded with spaces. This means you will want to use one of these data types when every value in the column is the same length. What is the difference between CHAR and NCHAR? CHAR uses what is known as ASCII while NCHAR uses Unicode. The difference is what characters are allowed and how much space each character takes. ASCII takes up less space but only supports English, numbers, and some symbols. UNICODE allows you to store characters from multiple languages but takes up more space.
Those were both fixed-length string. What if you want to store data that changes in length? That is where VARCHAR2 and NVARCHAR2 come in.
When it comes to storing dates, the data types that are most important are DATE and TIMESTAMP. Date can be used to store dates and time. Timestamp is a data type that can be used to store an exact moment in time.
Lastly, there are interval types. These store a date range.
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Views: 5486
Caleb Curry

Explains the approximate numeric data type DOUBLE PRECISION. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.

Views: 637
cbtinc

A lesson on how to identify the number of sig figs in a reported number

Views: 139
Thomas Harrison

Donate!: http://bit.ly/DonateCTVM2. Videos Available for Download - http://www.udemy.com/calebthevideomaker2-database-and-mysql-classes/
Playlist - http://www.youtube.com/watch?v=krx-w9icrkU&list=PL405B31DD586979DE
Manual:
Decimal: http://dev.mysql.com/doc/refman/5.6/en/fixed-point-types.html
floating point: http://dev.mysql.com/doc/refman/5.6/en/floating-point-types.html
Decimal(M, D)
precision is how many digits are in the number, and scale is how many digits after the decimal.
defaults are 65 and 35
decimals are accurate up to about 7 digits.
doubles are accurate up to about 15 digits.
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Views: 4075
Caleb Curry

https://www.databasestar.com/oracle-date-functions/
The Oracle CURRENT_TIMESTAMP function will display the current date and time in the session time zone.
Just like the CURRENT_DATE function, it uses the session time zone, which is where you logged in from. This could be different to the database time zone.
The syntax of the CURRENT_TIMESTAMP function is:
CURRENT_TIMESTAMP ( [precision] )
The return type of this function is TIMESTAMP WITH TIME ZONE.
The precision parameter is optional, and it lets you specify the number of fractional seconds to return. If this is omitted, it uses the default of 6.
It’s different to the SYSTIMESTAMP function, because CURRENT_TIMESTAMP returns the session timezone, and SYSTIMESTAMP returns the database time zone. So, if I’m logging in from Melbourne, Australia, and the database is in London, England, then the CURRENT_TIMESTAMP will return a date and time that’s 10 hours ahead of SYSTIMESTAMP, and in a different time zone. It may be on the same day, or it could be a different day, depending on when I run the function.
You can perform arithmetic on this function just like any other date value (e.g. CURRENT_TIMESTAMP - 7 for 7 days ago). However, it might be better to use interval data types so you can keep the original data type.
For more information about the Oracle CURRENT_TIMESTAMP function, including all of the SQL shown in this video and the examples, read the related article here:
https://www.databasestar.com/oracle-date-functions/

Views: 162
Database Star

See more at http://www.highercomputingforeveryone.com -- In this lesson I introduce several numeric data types in the C programming language.

Views: 23783
Carl Herold

In this video you'll be taught about the DECIMAL, NUMERIC, FLOAT, DOUBLE and REAL Data Types.

Views: 1224
Coding Senpai

Explains the exact numeric data type SMALLINT. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.

Views: 437
cbtinc

Explains the exact numeric data type INT or INTEGER. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.

Views: 849
cbtinc

What Is Floating Point Data Type In Numeric Data Types In Programming Languages In HINDI: Some precision required for floating point numbers, in terms of the numbers of digits used in the decimal representation, may be specified by the programmer, as a Ada.
• similar arithmetic operations, relational and assignment operations as with integers are usually provided for real.
• boolean operation has restrictions.
17-What is Initialization in Programming Languages | Initialization of variables https://youtu.be/oToFGE0CVVE
18- Numeric Data Types- Integer in Programming Languages | Integer a numeric data types https://youtu.be/1eB7KeP6iWo
Website:
http://www.tutorialsspace.com
Instagram
https://www.instagram.com/tutorialsspace/

Views: 506
tutorialsspace

This video is part of LearnItFirst's Transact-SQL Programming: SQL Server 2008/R2 course. More information on this video and course is available here:
http://www.learnitfirst.com/Course161
In this video, Scott will start with integer-based numbers, and then move into decimal-based numbers. How many bytes does it take to represent each basic integer data type? To demonstrate decimal-based numbers, money is used as the example. When a number is too long, unlike when a string is too long, Management Studio will return an overflow error instead of truncating. Scott discusses how to specify the number of digits and decimal places in the output, and more in this video.
Highlights from this video:
- INT, TINYINT, SMALLINT, and BIGINT
- The DATALENGTH function
- What if your business operates using less than 4 decimal places?
- Using FLOAT
and much more...

Views: 2354
LearnItFirst.com

What is precision and scale in SQL - Find out more explanation for : 'What is precision and scale in SQL' only from this channel.
Information Source: google

Views: 22
moibrad08b

Explains the exact numeric data type BIGINT. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.

Views: 524
cbtinc

Explains the exact numeric data type DEC, DECIMAL or NUMERIC. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.

Views: 1815
cbtinc

SDU Tools are free tools for SQL Server developers and DBAs. This tool is used to format the name of a data type (involving maximum length, precision, and scale) as is needed when scripting database objects like tables.
You'll find more info about SDU Tools and download details at http://www.sqldownunder.com/Resources/SDUTools

Views: 28
SQL Down Under

Java's BigDecimal class can handle arbitrary-precision signed decimal numbers.
Oracle Documentation - https://docs.oracle.com/javase/7/docs/api/java/math/BigDecimal.html
public class BigDecimal
extends Number
implements Comparable
Immutable, arbitrary-precision signed decimal numbers. A BigDecimal consists of an arbitrary precision integer unscaled value and a 32-bit integer scale. If zero or positive, the scale is the number of digits to the right of the decimal point. If negative, the unscaled value of the number is multiplied by ten to the power of the negation of the scale. The value of the number represented by the BigDecimal is, therefore (unscaledValue × 10-scale).

Views: 148
GeeksByte

Dr. Rob Edwards from San Diego State University discusses the different data types that can be used with SQL. Also see this comparison chart of different datatypes http://www-rohan.sdsu.edu/~edwardsr/classes/CS503/sqldatatypes.pdf

Views: 5244
RobEdwardsSDSU

Next up on our MySQL to-do list is to learn about storing dates and times. There are various data types in MySQL for storing dates and times. It seems MySQL and databases likes to break everything up into multiple data types to make things more organized at the consequence of being confusing and annoying.
This video is going to be talking about the DATETIME, DATE, and TIME data types. These are all used to store, you guessed it, dates and times. The one you choose depends on your needs. If you just need dates, choose DATE. If you just need times, choose TIME, if you need both stored together, choose DATETIME.
Now you set a column one of these data types whenever you want every row for this field to have some sort of date, time or both…but how exactly is the data formatted? This requires us to understand some convention. For example, in the USA at least, if you have something like 4:30AM, by convention you know the hour is 4 and the minutes are 30. But this is just an agreed upon convention. MySQL has its own convention…For example 2017-02-02. The first thing is the year, the second is the month, and the third is the day. That is for the DATE. The convention for time is 22:54:30. The first is the hour (military time), the second is the minute, and the third is the seconds. Lastly, there can actually be fractions of seconds…up to microseconds! .123456. To use fractional seconds though you must specify to MySQL the precision of the TIME or DATETIME when you create it, for example DATETIME(6) would allow microsecond precision.
How do you actually give a date to MySQL? By that I mean let's say you have a table with a column of DATETIME(6), and you want to give a value for that column, how do you format it? It's quoted. For example:
'2017-02-02 22:54:30.333333'
MySQL interprets this as a DATETIME.
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Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter
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Views: 29321
Caleb Curry

Demonstration of the influence of the Optimum Histogram utilities on the estimation accuracy of the Oracle
Optimizer in a 11.2.0.1 Oracle Database. Tests highlight the increase in estimation accuracy on the optimizer
and impact on execution plan selection.
Tests conducted against a numeric column in a heap table and execution plan results and statistics captured
to indicate impact on the optimizers execution plan selection of the OHU histograms.
IMPORTANT NOTE:
This utility is not a substitute for oracle's dbms_stats which calculates highly valuable statistics for oracle objects.
It is an add on utility that can be used on columns with skewed distribution.
Please see demonstration one for overview of architecture

Views: 4152
Doug Laughlin

Explains the SQL NCLOB or National Character Large OBject data type. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.

Views: 296
cbtinc

Explains the approximate numeric data type FLOAT. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.

Views: 884
cbtinc

This video is part of LearnItFirst's Transact-SQL Programming: SQL Server 2008/R2 course. More information on this video and course is available here:
http://www.learnitfirst.com/Course161
There is a lot to cover in this video, so get comfortable! This is the first of several videos about data types. Here, Scott gives you a high-level overview of data types, beginning with the four main "buckets" that you can use to categorize them: numbers, strings, temporal, and other. Each of these "buckets" will be explained in detail, and will introduce some new terms as well.
Highlights from this video:
- How to categorize data types
- Integer-based and decimal-based data types
- Bits and bytes
- What is meant by "scale" and "precision"?
- What is "Unicode"?
and much more...

Views: 2775
LearnItFirst.com

Vern Rabe talks to Oregon SQL User Group about Accuracy and precision in SQL Code.

Views: 122
Oregon SQL

What is precision and scale - Find out more explanation for : 'What is precision and scale' only from this channel.
Information Source: google

Views: 2
moibrad06b

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java primitive data types quiz
java variable type ranges
java data type range

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T3SO Tutorials

String functions are used in computer programming languages to manipulate a string or query information about a string (some do both). ... The most basic example of a string function is the length(string) function. This function returns the length of a string literal.Scalar-valued UDFs are an easy way to define constant values to use in your database environment. You can pass field values as parameters into UDFs. You can nest scalar function calls. This means that you can pass a call to a scalar-valued function to another function or stored procedure.Numeric functions perform manipulation of numbers that normally are contained in a table column. ... Returns a numeric value, rounded to the specified length or precision. SIGN() SQL server, MySQL, Oracle, PostgreSQL. Returns the positive (+1), zero (0), or negative (-1) sign of a numeric expression.A stored function (also called a user function or user-defined function) is a set of PL/SQL statements you can call by name. Stored functions are very similar to procedures, except that a function returns a value to the environment in which it is called. User functions can be used as part of a SQL expression.Function must return a value but in Stored Procedure it is optional( Procedure can return zero or n values). Functions can have only input parameters for it whereas Procedures can have input/output parameters . ... Functions can be called from Procedure whereas Procedures cannot be called from Function,The CTE was introduced into standard SQL in order to simplify various classes of SQL Queries for which a derived table just wasn't suitable. ... Introduced in SQL Server 2005, the common table expression (CTE) is a temporary named result set that you can reference within a SELECT, INSERT, UPDATE, or DELETE statement.The isDate(string, string) function accepts two string arguments. It takes them, compares the first argument with the second as a pattern and, if the first string can be converted to a date which is valid within system value of locale , according to the specified pattern , the function returns true.printf does the same, treating %s as a pointer-to-string. In C, variables that are arrays become a pointer to the first element of the array when used as function arguments -- so your scanf() sees a pointer to memory (assuming "str1" is an array).
SQL - Useful Functions
SQL COUNT Function - The SQL COUNT aggregate function is used to count the number of rows in a database table.
SQL MAX Function - The SQL MAX aggregate function allows us to select the highest (maximum) value for a certain column.
More items...
SQL has many built-in functions for performing processing on string or numeric data. Following is the list of all useful SQL built-in functions −
SQL COUNT Function - The SQL COUNT aggregate function is used to count the number of rows in a database table.
SQL MAX Function - The SQL MAX aggregate function allows us to select the highest (maximum) value for a certain column.
SQL MIN Function - The SQL MIN aggregate function allows us to select the lowest (minimum) value for a certain column.
SQL - The SQL AVG aggregate function selects the average value for certain table column.
SQL SUM Function - The SQL SUM aggregate function allows selecting the total for a numeric column.
SQL SQRT Functions - This is used to generate a square root of a given number.
SQL RAND Function - This is used to generate a random number using SQL command.
SQL CONCAT Function - This is used to concatenate any string inside any SQL command.
SQL Numeric Functions - Complete list of SQL functions required to manipulate numbers in SQL.
SQL String Functions - Complete list of SQL functions required to manipulate strings in SQL.
Returns a Unicode string with the delimiters added to make the input string a valid SQL Server delimited identifier. REPLACE. Replaces a sequence of characters in a string with another set of characters. REPLICATE. Repeats a string value a specified number of times.SQL. Character Functions with Examples. Character functions accept character inputs and can return either characters or number values as output. SQL provides a number of different character datatypes which includes – CHAR, VARCHAR, VARCHAR2, LONG, RAW, and LONG RAW.Aggregate Functions: Aggregates the values and return a single value, below is the list of some aggregate values in sql server. These functions are created by user in the system database, and we have 3 types of user define functions: Scalar Function. Inline Table-Valued Function.

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Technology mart

How we represent numbers in computers. Part of a larger series teaching programming. Visit codeschool.org
Twitter: @brianwill

Views: 5398
Brian Will

sql String functions are used in computer programming languages to manipulate a string or query information about a string (some do both). ... The most basic example of a string function is the length(string) function. This function returns the length of a string literal.Scalar-valued UDFs are an easy way to define constant values to use in your database environment. You can pass field values as parameters into UDFs. You can nest scalar function calls. This means that you can pass a call to a scalar-valued function to another function or stored procedure.Numeric functions perform manipulation of numbers that normally are contained in a table column. ... Returns a numeric value, rounded to the specified length or precision. SIGN() SQL server, MySQL, Oracle, PostgreSQL. Returns the positive (+1), zero (0), or negative (-1) sign of a numeric expression.A stored function (also called a user function or user-defined function) is a set of PL/SQL statements you can call by name. Stored functions are very similar to procedures, except that a function returns a value to the environment in which it is called. User functions can be used as part of a SQL expression.Function must return a value but in Stored Procedure it is optional( Procedure can return zero or n values). Functions can have only input parameters for it whereas Procedures can have input/output parameters . ... Functions can be called from Procedure whereas Procedures cannot be called from Function,The CTE was introduced into standard SQL in order to simplify various classes of SQL Queries for which a derived table just wasn't suitable. ... Introduced in SQL Server 2005, the common table expression (CTE) is a temporary named result set that you can reference within a SELECT, INSERT, UPDATE, or DELETE statement.The isDate(string, string) function accepts two string arguments. It takes them, compares the first argument with the second as a pattern and, if the first string can be converted to a date which is valid within system value of locale , according to the specified pattern , the function returns true.printf does the same, treating %s as a pointer-to-string. In C, variables that are arrays become a pointer to the first element of the array when used as function arguments -- so your scanf() sees a pointer to memory (assuming "str1" is an array).
SQL - Useful Functions
SQL COUNT Function - The SQL COUNT aggregate function is used to count the number of rows in a database table.
SQL MAX Function - The SQL MAX aggregate function allows us to select the highest (maximum) value for a certain column.
More items...
SQL has many built-in functions for performing processing on string or numeric data. Following is the list of all useful SQL built-in functions −
SQL COUNT Function - The SQL COUNT aggregate function is used to count the number of rows in a database table.
SQL MAX Function - The SQL MAX aggregate function allows us to select the highest (maximum) value for a certain column.
SQL MIN Function - The SQL MIN aggregate function allows us to select the lowest (minimum) value for a certain column.
SQL - The SQL AVG aggregate function selects the average value for certain table column.
SQL SUM Function - The SQL SUM aggregate function allows selecting the total for a numeric column.
SQL SQRT Functions - This is used to generate a square root of a given number.
SQL RAND Function - This is used to generate a random number using SQL command.
SQL CONCAT Function - This is used to concatenate any string inside any SQL command.
SQL Numeric Functions - Complete list of SQL functions required to manipulate numbers in SQL.
SQL String Functions - Complete list of SQL functions required to manipulate strings in SQL.
Returns a Unicode string with the delimiters added to make the input string a valid SQL Server delimited identifier. REPLACE. Replaces a sequence of characters in a string with another set of characters. REPLICATE. Repeats a string value a specified number of times.SQL. Character Functions with Examples. Character functions accept character inputs and can return either characters or number values as output. SQL provides a number of different character datatypes which includes – CHAR, VARCHAR, VARCHAR2, LONG, RAW, and LONG RAW.Aggregate Functions: Aggregates the values and return a single value, below is the list of some aggregate values in sql server. These functions are created by user in the system database, and we have 3 types of user define functions: Scalar Function. Inline Table-Valued Function.

Views: 3
Technology mart

Data conversion is the conversion of computer data from one format to another. Throughout a computer environment, data is encoded in a variety of ways. ... Similarly, the operating system is predicated on certain standards for data and file handling. Furthermore, each computer program handles data in a different manner.
Binary to Decimal
Decimal to Binary, Octal, Hexadecimal
A systematic method for number conversion
Binary to Octal
Octal to Binary
Binary to Hexadecimal
Hexadecimal to Binary
Number System Conversion
Numeral Systems - Binary, Octal, Decimal, Hex
Number System and base conversions
Converting Between Binary, Octal, Decimal, and Hexadecimal
Number Systems - Converting Decimal, Binary and Hexadecimal
Conversion between number systems
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Learn with Khalil

Explains the approximate numeric data type REAL. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.

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cbtinc

this video helps to understand how to deal with failed messages with precision exceeds in one of the field in database table, which is used in our target mapping for insert statement

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SAP PI Reference

The table is now empty
I will first upload data from excel using only the sqloledb connection provider and ado recordset commands and as the table contains decimal data type among text, integers and null values as well the results will show that all decimal numbers have changed. So unlike with other database, this method is not reliable unless can tell if I'm doing something wrong somewhere.
The table is now empty
I will then upload this data using a dedicated workbook that will shift decimal before they are sent to the database table and shift down when they are in the database table.
This workbook provides additional checks, it can detect automatically decimal and do operations or it can work in a manual way when there are many columns, the macro will be slow to run, then columns with a yellow background will be automatically shift to integer values.
What's also nice with this workbook is that it's independant from Windows regional settings as these might differ between the spreadsheet, the macro ide (vba) and sql server itself. It is often a pain to understand something is not working at this level.
What's left to do to be complete would be about dates since it's not only a matter of a regional symbol, they can differ in their meaning and lead nowhere sometimes without being detected.
VBA can take care of dates in multiple ways, I will look for something that has already been done that could be apply. Unlike with decimal where I look in many website and could never find an appropriate answer, so I decided to build my own tool.
Now, the data I want to copy (without dates for now) just need to be on a spreadsheet, copy the right table name and database infos, click the button and the data is copied in an easy and reliable way.
To conclude, VBA can arrange the data but can also make a spreadsheet as a front end database interface. How come Microsoft hasn't thought about this in the first place, SQLOLEDB, the changes should apply in a few dll in C or C++, that shouldn't be too many changes??? Unless there are side effects with other .Net components, who can tell?

Views: 114
Pascal B

Windowing Functions in Spark SQL Part 2 | First Value & Last Value Functions | Window Functions
https://acadgild.com/big-data/big-data-development-training-certification?utm_source=youtube&utm_medium=organic&utm_campaign=Yotube_tsQ2oQieBGY-window-function-spark-2_20180507
Hello and welcome back to Hadoop tutorials powered by Acadgild. This is the video in the series of Windowing functions in Spark. In this tutorial, we would understand the internals of First_value and Last_value functions in this lecture. Before that, if you have missed the first part of Windowing functions in spark SQL part 1 i.e. Lead and Lag functions, here is the link,
https://www.youtube.com/watch?v=MViPRjaqfaA&t=3s
These are inbuilt functions which operate on a set of rows and return a single value for each row from the underlying query. This can be very useful to simplify complex queries and break them down into logical components.
To give you a brief idea of these windowing functions in spark, we will be using stock market data. You can download the sample stocks data from the link in the following,
Dataset download link: https://drive.google.com/open?id=1nWGndnKxCNi5WKqPMBbrEhp4CBIWb7O-
Commands link for First value and Last Value: https://drive.google.com/open?id=1jjtg26NkJURbfzGvZ1r-voCX0gFv1xwu
Let's now understand the input(Dataset) and expected the output of First_value function.
1st column in this dataset is the date, 2nd column is the ticker which is nothing but the stock name, 3rd column is the open value of a stock, 4th column is the highest value of stock on a particular day, 5th column is the lowest value of stock on a particular day, 6th column is the closing value of stock, and the last column is the volume of the stocks on that particular day.
In the sample output on the right-hand side of the screen. We have performed the query to retrieve ticker, date, high and derived column First_heigh. which is the value of high when ticker appears 1st time in the dataset.
Kindly go through the execution part in the video, Please, subscribe and stay tuned for more such videos.
#sparksql, #windowing, #Hadoop, #bigdata
For more updates on courses and tips follow us on:
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Views: 315
ACADGILD

This video will provide you the details of each Mathematical Function in SQL Server 2014.
***********************************************************************
Mathematical Functions Part I
https://www.youtube.com/watch?v=EL9JNDURGvg
*************************************************************************
ROUND (Transact-SQL)
Returns a numeric value, rounded to the specified length or precision.
Syntax
ROUND ( numeric_expression , length [ ,function ] )
Arguments
numeric_expression
Is an expression of the exact numeric or approximate numeric data type category, except for the bit data type.
length
Is the precision to which numeric_expression is to be rounded. length must be an expression of type tinyint, smallint, or int. When length is a positive number, numeric_expression is rounded to the number of decimal positions specified by length. When length is a negative number, numeric_expressionis rounded on the left side of the decimal point, as specified by length.
function
Is the type of operation to perform. function must be tinyint, smallint, or int. When function is omitted or has a value of 0 (default), numeric_expressionis rounded. When a value other than 0 is specified, numeric_expression is truncated.
Return Types
Returns the following data types.
Expression result Return type
tinyint int
smallint int
int int
bigint bigint
decimal and numeric category (p, s) decimal(p, s)
money and smallmoney category money
float and real category float
Remarks
ROUND always returns a value. If length is negative and larger than the number of digits before the decimal point, ROUND returns 0.
Example Result
ROUND(748.58, -4) 0
ROUND returns a rounded numeric_expression, regardless of data type, when length is a negative number.
Examples Result
ROUND(748.58, -1) 750.00
ROUND(748.58, -2) 700.00
ROUND(748.58, -3) Results in an arithmetic overflow, because 748.58 defaults to decimal(5,2), which cannot return 1000.00.
To round up to 4 digits, change the data type of the input. For example:
SELECT ROUND(CAST (748.58 AS decimal (6,2)),-3); 1000.00
Examples
A. Using ROUND and rounding approximations
The following example shows rounding and approximations.
SELECT ROUND(123.4545, 2);
GO
SELECT ROUND(123.45, -2);
GO
*******************************************************************************
SQRT (Transact-SQL)
Returns the square root of the specified float value.
Syntax
SQRT ( float_expression )
Arguments
float_expression
Is an expression of type float or of a type that can be implicitly converted to float.
Return Types
float
*******************************************************************************
SQUARE (Transact-SQL)
Returns the square of the specified float value.
Syntax
SQUARE ( float_expression )
Arguments
float_expression
Is an expression of type float or of a type that can be implicitly converted to float.
Return Types
Float

Views: 121
Softtech forum

Explains exact numeric data types with a comparison of usage by the major databases. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.

Views: 260
cbtinc

Explains approximate numeric data types with a comparison of usage by the major databases. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.

Views: 223
cbtinc

Explains the SQL LONG VARCHAR data type. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.

Views: 719
cbtinc

Explains the Numeric Scalar Function CHARACTER_LENGTH and CHAR_LENGTH for finding the number of characters in the strings or expressions. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.

Views: 231
cbtinc