Question

The program I am working on has a poorly designed backend and basically there are two different tables needed to hold the exact same information. I am trying to write a trigger that will update table B with the same information that was just updated in table A. Oh and this is using a MYSQL database
I am not sure if I am just having a syntax error or if I am missing concepts, any help would be much appreciated… here is what I have as of yet

DELIMITER $$         
DROP TRIGGER IF EXISTS after_update_A;

CREATE TRIGGER `after_update_A` 

    AFTER UPDATE ON `A`  FOR EACH ROW
    BEGIN
        UPDATE TABLE B
        SET  username = NEW.username
           , password = NEW.password
           , email = NEW.email
        WHERE id = NEW.id
    END

    $$
DELIMITER ;

And the errors I get are all some what similar to this…
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘= users.username
, B.email = users.email
D’ at line 4

Answer 1

You need to close every statement inside the trigger with a ;, and I do mean every.

CREATE TRIGGER `after_update_A` AFTER UPDATE ON `A` FOR EACH ROW
BEGIN
    UPDATE TABLE B
    SET  username = NEW.username
       , password = NEW.password
       , email = NEW.email
    WHERE id = NEW.id;    //<<-----------
END $$