我具有以下表结构:
CREATE TABLE IF NOT EXISTS `reports` ( `id` int(11) NOT NULL AUTO_INCREMENT, `day` int(11) NOT NULL, `uid` int(11) NOT NULL, `siteid` int(11) NOT NULL, `cid` int(3) NOT NULL, `visits` int(11) NOT NULL, PRIMARY KEY (`id`) )
目前,我使用以下代码段检查和插入/更新:
$checkq = mysql_query("SELECT count(*) as rowexist FROM reports WHERE day='$day' AND uid='$uid' AND siteid='$sid' AND cid='$cid'") or die(mysql_error()); $checkr = mysql_fetch_array($checkq); if ($checkr['rowexist'] > 0) { mysql_query("UPDATE reports_adv SET visits=visits+1 WHERE day='$day' AND uid='$uid' AND siteid='$sid' AND cid='$cid'"); } else { mysql_query("INSERT INTO reports_adv SET day='$day', uid='$uid', siteid='$sid', cid='$cid', visits='1'"); }
如果存在行,否则插入超过2个非唯一键是更新此MySQL表的最快方法吗?
只是使用 INSERT...ON DUPLICATE KEY UPDATE
INSERT...ON DUPLICATE KEY UPDATE
INSERT INTO reports_adv (day, uid, siteid, cid, visits) VALUES ('$day', '$uid', '$sid', '$cid', 1) ON DUPLICATE KEY UPDATE visits=visits+1;
但在进行其他操作之前,您应该UNIQUE在列上定义约束。
UNIQUE
ALTER TABLE reports_adv ADD CONSTRAINT tb_uq UNIQUE (day, uid, siteid, cid)