UCH sql语句

$_SGLOBAL['db']->query("DELETE ".tname('app_tw_gift')." WHERE id='$lw' ");

错误提示
MySQL Error
Message: MySQL Query Error
SQL: delete from uchome_app_tw_gift id='118'
Error: 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 'id='118'' at line 1
Errno.: 1064


是语句哪里错了吗？

做什么操作提示这个错误的，是不是安装了什么插件？