What are the variable types in SQL?

SQL data types can be broadly divided into following categories.

• Numeric data types such as int, tinyint, bigint, float, real, etc.
• Date and Time data types such as Date, Time, Datetime, etc.
• Character and String data types such as char, varchar, text, etc.

What are SQL Server variables?

A variable is an object that holds a single value of a specific type e.g., integer, date, or varying character string. We typically use variables in the following cases: As a loop counter to count the number of times a loop is performed. To hold a value to be tested by a control-of-flow statement such as WHILE .

What are the types of SQL Server?

Various Editions of SQL Server are Enterprise, Standard, Web, Developer, and Express.

What is a table variable in SQL?

The table variable is a special type of the local variable that helps to store data temporarily, similar to the temp table in SQL Server. In fact, the table variable provides all the properties of the local variable, but the local variables have some limitations, unlike temp or regular tables.

How add variable in SQL query?

The syntax for assigning a value to a SQL variable within a SELECT query is @ var_name := value , where var_name is the variable name and value is a value that you’re retrieving. The variable may be used in subsequent queries wherever an expression is allowed, such as in a WHERE clause or in an INSERT statement.

How many data types are there in SQL Server?

Data types in MsSQL Server

Data type	Length	Description
tinyint	1	Integer from 0 to 255
bit	1 bit	Integer 0 or 1.
decimal(precision, scale)	5-17	Numeric data type with fixed precision and scale (accuracy 1-38, 18 by default and scale 0-p, 0 by default).
numeric	5-17	The same as decimal data type.

What are the different SQL functions?

SQL Functions

• AVG() – Returns the average value.
• COUNT() – Returns the number of rows.
• FIRST() – Returns the first value.
• LAST() – Returns the last value.
• MAX() – Returns the largest value.
• MIN() – Returns the smallest value.
• SUM() – Returns the sum.

What are different types of SQL functions Class 12?

The functions used in SQL can be categorised into two categories namely single row or scalar functions and multiple row or group or aggregate functions.

• Single Row Functions.
• Multiple Row Functions.
• EQUI-JOIN.
• Non-Equi Join.
• Natural Join.

What are variables and data types?

A variable’s type determines the values that the variable can have and the operations that can be performed on it. For example, the declaration int count declares that count is an integer ( int ). Primitive types contain a single value and include types such as integer, floating point, character, and boolean.