What is DECLARE in SQL?

Question

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. 18 нояб. 2019 г.

What is DECLARE in database?

Declares the name of a database.

How do you DECLARE a statement?

Use the DECLARE statement to define a variable, the data type of the variable and, optionally, its initial value. You can define three types of variable with the DECLARE statement: External. Normal.

What is the difference between DECLARE and set?

When you declare it you declare the variable name, the type, and a default value, which could be an expression. SET is for initializing the variable you declared previously, and you cannot SET the variable until you DECLARE it.

How do you DECLARE a number in SQL?

Finally, let's look at how to declare an INT variable in SQL Server and assign an inital value. For example: DECLARE @site_value INT = 10; This variable declaration example would declare a variable called @site_value that is an INT datatype.

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