You can't specify target table for update in FROM clause

Question

I have a simple mysql table:

CREATE TABLE IF NOT EXISTS `pers` (
  `persID` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(35) NOT NULL,
  `gehalt` int(11         


        

Answer 1

It's quite simple. For example, instead of writing:

INSERT INTO x (id, parent_id, code) VALUES (
    NULL,
    (SELECT id FROM x WHERE code='AAA'),
    'BBB'
);

you should write

INSERT INTO x (id, parent_id, code)
VALUES (
    NULL,
    (SELECT t.id FROM (SELECT id, code FROM x) t WHERE t.code='AAA'),
    'BBB'
);

or similar.