Question

I want to update two tables before insert into table table1, in phpmyadmin, but phpmyadmin displays error after creating this trigger (Error in MySQL syntax).

This works:

CREATE TRIGGER `my_trig`   
BEFORE INSERT ON `table1` 
FOR EACH ROW 
update table2 
set 
attr = attr+NEW.attr
where table2.id = NEW.id;

This works too (without the first trigger, of course):

CREATE TRIGGER `my_trig`   
BEFORE INSERT ON `table1` 
FOR EACH ROW 
update table3 
set 
attr = attr+NEW.attr
where table3.id = NEW.id;

But using BEGIN- update1; update2; -END it can´t be created. Any ideas how to create this type of trigger? Thanks in advance for your help.

Answer 1

you have extra comma after the set statement

attr = attr + NEW.attr,

fix,

CREATE TRIGGER `my_trig`   
BEFORE INSERT ON `table1` 
FOR EACH ROW 
UPDATE   table2 
SET     attr = attr + NEW.attr // <=== removed
WHERE   table2.id = NEW.id;

using BEGIN-END

DELIMITER $$ 
CREATE TRIGGER `my_trig`   
BEFORE INSERT ON `table1` 
FOR EACH ROW
BEGIN 
    UPDATE   table2 
    SET     attr = attr + NEW.attr
    WHERE   table2.id = NEW.id;
END $$ 
DELIMITER ;

• MySQL Trigger Example