Declaring and using MySQL varchar variables

Question

I\'m trying to do some simple manipulations with variables in MySQL 5.0 but I can\'t quite get it to work. I\'ve seen many (very!) different syntaxen for DECLARE/SET, I\'m not

Answer 1

Looks like you forgot the @ in variable declaration. Also I remember having problems with SET in MySql a long time ago.

Try

DECLARE @FOO varchar(7);
DECLARE @oldFOO varchar(7);
SELECT @FOO = '138';
SELECT @oldFOO = CONCAT('0', @FOO);

update mypermits 
   set person = @FOO 
 where person = @oldFOO;