When am trying to execute this query
$followers = "(SELECT `user` FROM `follow` WHERE `follower` LIKE '".$id."' )";
$onliners = "(SELECT * FROM `user_online` WHERE `user_id` IN $followers)";
$results = Yii::app()->db->createCommand("SELECT * FROM `ss_individual` where `id` IN $onliners")->queryAll();
I got this error:
CDbCommand failed to execute the SQL statement: SQLSTATE[21000]: Cardinality violation: 1241 Operand should contain
1 column(s). The SQL statement executed was: SELECT * FROM `ss_individual` where `id` IN (SELECT * FROM `user_online` WHERE `user_id` IN (SELECT `user` FROM `follow` WHERE `follower` LIKE 'CMU1019' ))
How to solve this?