General MySQL Oracle SQL Server

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Entering Date and Time Values in SQL Server
How To Enter Date and Time values in SQL Server Transact-SQL? Transact-SQL does not support date and time literals. If you want to enter date and time values, you have to use character string literals and rely implicit casting rules to convert them into date and time values. When casting character s... 2017-04-15, 652👍, 0💬

Date-Only DATETIME Values in SQL Server Transact-SQL
What Happens If Date-Only Values Are Provided for DATETIME in SQL Server Transact-SQL? If only date value is provided in a DATETIME variable, the SQL Server will pad the time value with a zero, or '00:00:00.000', representing the midnight time of the day. The tutorial exercise below gives you some g... 2017-04-08, 671👍, 0💬

Single-Byte Character Data Types in SQL Server Transact-SQL
What are single-byte character string data types supported in SQL Server Transact-SQL? Single-byte character string data types are used to hold single-byte character strings. There are 3 single-byte character string data types supported in SQL Server Transact-SQL: 1. CHAR (or CHARACTER) - Used to ho... 2017-04-08, 1006👍, 0💬

Unicode Character Data Types in SQL Server Transact-SQL
What are Unicode character string data types supported in SQL Server Transact-SQL? Unicode character string data types are used to hold Unicode character strings. There are 3 Unicode character string data types supported in SQL Server Transact-SQL: 1. NCHAR (or NATIONAL CHAR, or NATIONAL CHARACTER) ... 2017-04-08, 785👍, 0💬

Out-of-Range DATETIME Values in SQL Server Transact-SQL
What Are Out-of-Range Errors with DATETIME values in SQL Server Transact-SQL? When you enter DATETIME values, you may get out-of-range errors due to two common mistakes: The date value is a valid calendar date, but it is not in the range covered by DATETIME data type: from January 1, 1753, to Decemb... 2017-04-08, 773👍, 0💬

Time-Only DATETIME Values in SQL Server Transact-SQL
What Happens If Time-Only Values Are Provided for DATETIME variables in SQL Server Transact-SQL? If only time value is provided in a DATETIME variable, the SQL Server will pad the date value with a zero, representing the base date, January 1, 1900. The tutorial exercise below gives you some good exa... 2017-04-08, 756👍, 0💬

Binary String Data Types in SQL Server Transact-SQL
What are binary string data types supported in SQL Server Transact-SQL? Binary string data types are used to hold binary character strings. There are 3 binary string data types supported in SQL Server Transact-SQL: 1. BINARY - Used to hold binary strings of a fixed length, specified in the format of... 2017-04-04, 788👍, 0💬

DECLARE Statements in SQL Server Transact-SQL
How to declare a variable in SQL Server Transact-SQL? How to use the DECLARE statements? In Transact-SQL, you must use DECLARE statements to declare variables. Declaring a variable is to define the variable name and the variable data type. In Transact-SQL, you can: Declare a single variable in a sin... 2017-04-04, 771👍, 0💬

Differences of CHAR and VARCHAR in SQL Server Transact-SQL
What Are the Differences between CHAR and VARCHAR in SQL Server Transact-SQL? CHAR and VARCHAR are both used to store code page based 1-byte character strings in Transact-SQL. But they have the following main differences: CHAR(n) stores character strings with a fixed length, n bytes, storage format.... 2017-04-04, 742👍, 0💬

SET Statements in SQL Server Transact-SQL
How to assign value to a variable in SQL Server Transact-SQL? How to use the SET statements? In Transact-SQL, you can use SET statements to assign values to variables using the assignment operator =, in the syntax of: SET @variable = &lt;value&gt; When an SET statement is executed, the syste... 2017-04-04, 724👍, 0💬

Differences of CHAR and NCHAR in SQL Server Transact-SQL
What Are the Differences between CHAR and NCHAR in SQL Server Transact-SQL? Both CHAR and NCHAR are fixed length data types in Transact-SQL. But they have the following main differences: CHAR stores characters based on the code page with 1 byte per character most of the time. NCHAR stores characters... 2017-04-04, 669👍, 0💬

PRINT Statements in SQL Server Transact-SQL
How to print value on console in SQL Server Transact-SQL? How to use the PRINT statements? In Transact-SQL, you can use PRINT statements to print values on the console of the client tool, in the syntax of: PRINT &lt;value&gt; When a PRINT statement is executed, the system will: Print the val... 2017-04-01, 781👍, 0💬

CONVERT/CAST Function in SQL Server Transact-SQL
How to convert value from one data type to another in SQL Server Transact-SQL? How to use the CONVERT function or the CAST function? In Transact-SQL, you can use CONVERT statements to convert values from one data type to another, in the syntax of: CONVERT(data_type, value[, style]) In this syntax, "... 2017-04-01, 768👍, 0💬

Rules on Arithmetic Operations in SQL Server
What Are Arithmetic Operators in SQL Server Transact-SQL? An arithmetic operator performs an arithmetic operation on two expressions of numeric data types. SQL Server supports 5 arithmetic operators: + (Add): Addition - (Subtract): Subtraction * (Multiply): Multiplication / (Divide): Division % (Mod... 2017-04-01, 738👍, 0💬

Numeric Expressions and Functions in SQL Server Transact-SQL
Where to find answers to frequently asked questions on Numeric Expressions and Functions in SQL Server Transact-SQL? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Numeric Expressions and Functions in SQL Server Transact-SQL. Clear answers are pr... 2017-04-01, 708👍, 0💬

What Is an Expression in SQL Server
What Is an Expression in SQL Server Transact-SQL? An expression is a combination of identifiers, values, and operators that SQL Server 2005 can evaluate to obtain a numeric value. A simple expression could be a constant, a function, a column name, a variable, or a subquery without any operators. Com... 2017-04-01, 687👍, 0💬

CAST() - Converting Numeric Expression Data Types in SQL Server
How To Convert Numeric Expression Data Types using the CAST() Function in SQL Server Transact-SQL? If you want to convert the data type of a numeric expression to a new data type, you can use the CAST(expression AS data_type) function. The tutorial exercise below shows you how to use the CAST() func... 2017-03-27, 1573👍, 0💬

CONVERT() - Converting Numeric Expression Data Types in SQL Server
How To Convert Numeric Expression Data Types using the CONVERT() Function in SQL Server Transact-SQL? If you want to convert the data type of a numeric expression to a new data type, you can use the CONVERT(data_type, expression) function. The tutorial exercise below shows you how to use the CONVERT... 2017-03-27, 1442👍, 0💬

Converting Numeric Data Types by Assignment Operations in SQL Server
How To Convert Numeric Expression Data Types by Assignment Operations in SQL Server Transact-SQL? An assignment operation is used to assign an expression to a variable, a column, or a parameter. If the data type of the expression does not match the data type of the receiving variable, column, or par... 2017-03-27, 778👍, 0💬

Converting Numeric Expressions from One Data Type to Another in SQL Server
How To Convert a Numeric Expression from One Data Type to Another in SQL Server Transact-SQL? There are 4 ways to convert a numeric expression from one data type to another data type: Implicit conversion by arithmetic operations - When arithmetic operations are performed on expressions of different ... 2017-03-27, 689👍, 0💬

Arithmetic Operations with Different Data Types in SQL Server
What Happens to an Arithmetic Operation with Two Different Data Types in SQL Server Transact-SQL? When two expressions with different data types are put together for an arithmetic operation, the expression with a lower rank data type will be converted automatically to higher rank data type. Usually,... 2017-03-27, 654👍, 0💬

FLOOR, CEILING, ROUND - Converting Values to Integers in SQL Server
How To Convert Numeric Values to Integers in SQL Server Transact-SQL? Sometimes you need to round a numeric value into an integer. SQL Server 2005 offers you a number of ways to do this: FLOOR(value) - Returning the largest integer less than or equal to the input value. The returning data type is th... 2017-03-22, 1753👍, 0💬

CONVERT() - Converting Character Strings to Numeric Values in SQL Server
How To Convert Character Strings into Numeric Values in SQL Server Transact-SQL? Sometimes you need to convert numeric values enclosed in character strings back to numeric values by using the CONVERT() function. When converting character strings to values with CONVERT(), you need to remember two rul... 2017-03-22, 1625👍, 0💬

Overflow Errors on Converting Big Values to NUMERIC in SQL Server
What Happens When Converting Big Values to NUMERIC Data Types in SQL Server Transact-SQL? If you are converting a numeric expression to a NUMERIC data type and the value is too big for the storage size, you will get an arithmetic overflow error as shown in the following examples: -- Overflow error o... 2017-03-22, 695👍, 0💬

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General MySQL Oracle SQL Server