помогите найти ошибку в mysql запросе

Question

$sql = "DELETE FROM `field_data_field_adds` WHERE `bundle` = '_tovar1' || '_contragent';"; 
при выполнении пишет :"You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''field_data_field_corp' WHERE 'bundle' = '_tovar1' || '_contragent'' at line 1"

*cтаська * · Accepted Answer

$sql = "DELETE FROM `field_data_field_adds` WHERE `bundle` = '_tovar1' OR `bundle` = '_contragent';"; 
Или 
$sql = "DELETE FROM `field_data_field_adds` WHERE `bundle` IN ('_tovar1', '_contragent')