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Variables and Data Types in SQL Server Transact-SQL
Where to find answers to frequently asked questions on variables and data types in Microsoft SQL Server Transact-SQL? I am new to Transact-SQL and SQL Server. Here is a list of frequently asked questions and their answers compiled by FYIcenter.com team on variables and data types in Microsoft SQL Se...
2017-04-22, 161👍, 0💬

Exact Numeric Data Types in SQL Server Transact-SQL
What are exact numeric data types supported in SQL Server Transact-SQL? Exact numeric data types are used to hold numeric values truncated to a specific precision and scale. There are 8 different exact numeric data types supported in SQL Server Transact-SQL: 1. BIGINT - Used to hold big integers wit...
2017-04-22, 145👍, 0💬

What Is Variable in SQL Server Transact-SQL
What is a variable in SQL Server Transact-SQL? A variable in Transact-SQL is a symbolic name representing a memory storage that holds a piece of data. A variable has the following the components: 1. Variable name - A symbolic name to represent the variable. Variable names in Transact-SQL must starts...
2017-04-22, 143👍, 0💬

Entering Binary String Literals in SQL Server Transact-SQL
How To Enter Binary String Literals in SQL Server Transact-SQL? Binary string long values are normally generated by client applications by reading input channels, like image files. But sometimes, you may need to enter some short binary strings as literals. Binary string literals are entered as a str...
2017-04-22, 143👍, 0💬

List of Data Types in SQL Server Transact-SQL
How many data types supported in SQL Server Transact-SQL? I want a list of all data types. Here is a list of all Transact-SQL data types divided into 6 categories: 1. Exact Number - Used to hold numeric values truncated to a specific precision and scale. BIGINT - Used to hold big integers. INT (or I...
2017-04-22, 140👍, 0💬

Underflow and Overflow of FLOAT Values in SQL Server Transact-SQL
What Are the Underflow and Overflow Behaviors on FLOAT Literals in SQL Server Transact-SQL? If you enter a floating number that is too big or too small for the FLOAT data type, Transact-SQL will behave as: FLOAT(24) Underflow: If a floating number is too small for FLOAT(24), it will be stored as 0 w...
2017-04-19, 169👍, 0💬

Approximate Numeric Data Types in SQL Server Transact-SQL
What are approximate numeric data types supported in SQL Server Transact-SQL? Approximate numeric data types are used to hold numeric values with floating scales. There are 3 different approximate numeric data types supported in SQL Server Transact-SQL: 1. FLOAT - Used to hold values with different ...
2017-04-19, 153👍, 0💬

Precision and Rounding of FLOAT Values in SQL Server Transact-SQL
How REAL and FLOAT Literal Values Are Rounded in SQL Server Transact-SQL? By definition, FLOAT(n) should store the mantissa of the floating number in n bits. For example, FLOAT(16) should have a precision one-byte less than FLOAT(24). However, SQL Server Transact-SQL only supports two precisions for...
2017-04-19, 151👍, 0💬

Overflow and Rounding on NUMERIC Values in SQL Server Transact-SQL
How Extra Digits Are Handled with NUMERIC Data Type Literals in SQL Server Transact-SQL? Exact numeric data types defined with NUMERIC(p,s) has two limits defined by two parameters: p (precision) and s (scale): Maximum number of digits of the integer part (digits before the decimal point) is defined...
2017-04-19, 150👍, 0💬

Overflow Errors with INT Values in SQL Server Transact-SQL
What Happens If an Integer Is Too Big for INT (INTEGER) Date Type in SQL Server Transact-SQL? If you are entering an INT data type literal with representing an integer value too big for INT data type to store, the SQL Server will give you an arithmetic overflow error. The same error will happen on B...
2017-04-19, 149👍, 0💬

Differences of DECIMAL and FLOAT in SQL Server
What Are the Differences between DECIMAL and FLOAT in SQL Server Transact-SQL? DECIMAL and FLOAT are both used to store numerical values. But they have the following main differences: DECIMAL(p,s) stores values with the decimal point fixed at the position of s (scale) digits from the right. The tota...
2017-04-15, 178👍, 0💬

Entering 0.001 Second in DATETIME in SQL Server Transact-SQL
Why I Can Not Enter 0.001 Second in DATETIME values in SQL Server Transact-SQL? If you enter milliseconds in data and time values, they will be rounded up to 10/3 millisecond increments, because DATETIME data type uses 4 bytes to store the time of the day. A 4-byte integer can only give an accuracy ...
2017-04-15, 167👍, 0💬

Date and Time Data Types in SQL Server Transact-SQL
What are date and time data types supported in SQL Server Transact-SQL? Date and time data types are used to hold dates and times. There are 6 date and time data types supported in SQL Server Transact-SQL: 1. DATETIME - Use to hold date and times with a large precision using 8-byte storages: 4 bytes...
2017-04-15, 161👍, 0💬

Casting Numeric Values to DATETIME in SQL Server Transact-SQL
Can I cast numeric values to DATETIME values in SQL Server Transact-SQL? Yes, you can cast numeric values to DATATIME values in Transact-SQL. The implicit casting rules are for numeric values to DATETIME values are: Numeric values are casted linearly to DATETIME values. Decimal 0 represents 1900-01-...
2017-04-15, 159👍, 0💬

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, 157👍, 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, 170👍, 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, 186👍, 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, 173👍, 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, 173👍, 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, 169👍, 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 = <value> When an SET statement is executed, the system will: ...
2017-04-04, 201👍, 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, 183👍, 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, 181👍, 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, 177👍, 0💬

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