How do I implement stored functions

MySQL stored functions are a way to encapsulate reusable SQL code that can perform calculations and return values. They improve code modularity, reusability, and readability. Here's a step-by-step guide on how to implement stored functions in MySQL.

Creating a Stored Function

To create a stored function, you use the CREATE FUNCTION statement followed by the function name, parameter definitions, and the return type of the value. Here’s a simple example that calculates the square of a number:

DELIMITER // CREATE FUNCTION square(num INT) RETURNS INT BEGIN RETURN num * num; END // DELIMITER ;

Using a Stored Function

Once created, you can use the stored function just like any other database function in your SQL queries:

SELECT square(4) AS result;

This will return 16, showing the square of 4.


MySQL stored functions SQL code reusable code database functions encapsulate modularity SQl functions performance optimization

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