declare variable sql server code example

Example 1: sql declare variable

-- Declare the variable to be used.
DECLARE @MyCounter int;

-- Initialize the variable.
SET @MyCounter = 0;

Example 2: declare table variable sql server

DECLARE @table_variable_name TABLE (
    column_list
);

Example:
DECLARE @product_table TABLE (
    product_name VARCHAR(MAX) NOT NULL,
    brand_id INT NOT NULL,
    list_price DEC(11,2) NOT NULL
);

Example 3: how to declare a variable in sql

DECLARE @COURSE_ID AS INT, @COURSE_NAME VARCHAR (10);

Example 4: local variables in sql

Local variables:
These variables can be used or exist 
only inside the function. These variables
are not used or referred by any other function.

Global variables:
These variables are the variables which
can be accessed throughout the program.
Global variables cannot be created
whenever that function is called.