Fastest way to update a MySQL table if row exists else insert. More than 2 non-unique keys

Question

I have the following table structure:

 CREATE TABLE IF NOT EXISTS `reports` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `day` int(11) NOT NULL,
  `uid` int(1         


        

Answer 1

just use INSERT...ON DUPLICATE KEY UPDATE

INSERT INTO reports_adv (day, uid, siteid, cid, visits) 
VALUES ('$day', '$uid', '$sid', '$cid', 1)
ON DUPLICATE KEY UPDATE visits=visits+1;

• INSERT ... ON DUPLICATE KEY UPDATE Syntax

but before anything else, you should define a UNIQUE constraint on the columns.

ALTER TABLE reports_adv  ADD CONSTRAINT tb_uq UNIQUE (day, uid, siteid, cid)