declare parameter in sql 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 variable in stored procedure in sql server

DECLARE 
    @product_name VARCHAR(MAX),
    @list_price DECIMAL(10,2);

Example 3: how to declare a variable in sql

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