Where do we DECLARE SQL variable?

Where do we use DECLARE in SQL?

The DECLARE statement is used to declare a variable in SQL Server. In the second step, we have to specify the name of the variable. Local variable names have to start with an at (@) sign because this rule is a syntax necessity. Finally, we defined the data type of the variable.

How DECLARE variable in SQL Server?

Declaring a variable The DECLARE statement initializes a variable by assigning it a name and a data type. The variable name must start with the @ sign. In this example, the data type of the @model_year variable is SMALLINT . By default, when a variable is declared, its value is set to NULL .

Where is variable stored in SQL?

It is stored in the tempdb system database. The storage for the table variable is also in the tempdb database. We can use temporary tables in explicit transactions as well. Table variables cannot be used in explicit transactions.

How do you DECLARE and initialize a variable in SQL Server?

Initialization is an optional thing while declaring. By default, DECLARE initializes variable to NULL. Using the keyword 'AS' is optional. To declare more than one local variable, use a comma after the first local variable definition, and then define the next local variable name and data type.