Why delimiter used with stored procedure in mysql?

Question

I am trying to understand, why delimiter used with stored procedure in mysql? but i couldn\'t.

DELIMITER //
CREATE PROCEDURE GetAllProducts()
   BEGIN
       SEL         


        

Answer 1

Mysql's default delimiter is ; which is used for one statement in the command line , something as

select * from users ;

When you write a trigger or stored procedure to execute the entire code mysql needs to understand that its a block of code/query.

If no delimiter is provided then when mysql encounters any ; inside the store procedure or trigger it will think that as one statement and will try to execute it. So we need to provide a delimiter for store procedure or trigger and make mysql understand that anything within that delimiter is one complete set of code.

So in your example

SELECT * FROM products; 

it will be a part of the complete statement when there is a delimiter other than ; is provided at the beginning.