Discuz! info: MySQL Query Error

Time: 2015-4-2 8:18am
Script: /forumdisplay.php

SQL: select count(*) num
from paitw_db.lm_period P
join paitw_db.lm_item I on P.itemid=I.itemid
join paitw_db.lm_merchants M on M.mid=I.mid
where M.mid=7
Error: Table 'paitw_db.lm_period' doesn't exist
Errno.: 1146

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