ruby-rails
answered May 1 '23 00:00
user can use the CREATE FUNCTION statement to create a function in MySQL . The basic syntax is as follows:
CREATE FUNCTION function_name(parameter1 datatype, parameter2 datatype, ...)
RETURNS return_datatype
BEGIN
-- function body
END;
Here's an example of creating a function that returns the sum of two integers:
CREATE FUNCTION sum_of_two_integers(a INT, b INT)
RETURNS INT
BEGIN
DECLARE result INT;
SET result = a + b;
RETURN result;
END;
In this example, we create a function called sumintegers that takes two integer parameters a and b, and returns the sum of these two integers as an integer value.
Inside the function body, we declare a local variable result, set its value to the sum of a and b, and then return the value of result using the RETURN statement.
Once the function is created, you can call it like any other MySQL function:
SELECT sumintegers(2, 3);
This will return the value 5.