To call a stored procedure in SQL, you use the CALL statement, followed by the name of the stored procedure and its parameters (if any).

Here’s the basic syntax for calling a stored procedure:

CALL stored_procedure_name(param1, param2, ...);

Where stored_procedure_name is the name of the stored procedure you want to call, and param1, param2, etc. are the parameters that you want to pass to the stored procedure.

For example, let’s say you have a stored procedure called calculate_total that takes two parameters (product_id and quantity) and returns the total cost of the products. Here’s how you can call this stored procedure:

CALL calculate_total(12345, 10);

In this example, we’re passing 12345 as the product_id parameter and 10 as the quantity parameter.

If the stored procedure returns a result set, you can use a SELECT statement to retrieve the result set:

SELECT * FROM calculate_total(12345, 10);

This will execute the calculate_total stored procedure with the parameters 12345 and 10, and return the result set.

In some cases, you may want to store the result of a stored procedure in a variable. To do this, you can use the SET statement to assign the result to a variable:

SET @total = (SELECT total_cost FROM calculate_total(12345, 10));

In this example, we’re assigning the value of the total_cost column from the result set returned by the calculate_total stored procedure to the @total variable.

Overall, calling a stored procedure in SQL is a simple process that involves using the CALL statement with the name of the stored procedure and its parameters, and retrieving the result set (if any) using a SELECT statement.

Learn all about SQL Learn SQL Now: Learn From Scratch to Advanced