Clarify the purpose/use of delimiters

[michael-small]

The following section of the lab writeup was confusing. My group spent a lot of time wondering why the function definition would terminate after writing so many lines.

Except that the ; is interpreted by the mariaDB client incorrectly. bangbang You need to change the command delimiter first:

DELIMITER //
CREATE FUNCTION FortyTwo() RETURNS TINYINT DETERMINISTIC
BEGIN
DECLARE x TINYINT;
SET x = 42;
RETURN x;
END
//
DELIMITER ;

Clarification on how "the ; is interpreted by the mariaDB client incorrectly" would be useful. I would say something along the lines of this StackOverflow user.

Additionally, a mention of how the delimiter declaration is something that affects not just the function definition process but all future commands would be good. That would establish why "DELIMITER ;" needs to be called at the end, because even after we sort of understood why "DELIMITER //" was declared, we were still flailing around with terminating other commands because we never changed it back to a semicolon.