查询语句求助

je_ck

select `alarm_site`.`ALARM_def_ID` AS `ALARM_def_ID`,`alarm_site`.`Site_id` AS `Site_id`,`alarm_site`.`ALARM_date` AS `ALARM_date`,group_concat(`alarm_site`.`ALARM_component` separator ',') AS `Component`,group_concat(distinct `alarm_site`.`ALARM_severity` separator ',') AS `Severity`,group_concat(`alarm_site`.`ALARM_starttime`,_utf8'~',`alarm_site`.`ALARM_cleartime` separator ',') AS `Fire_Clear_time`,`alarm_def`.`ALARM_def_Function` AS `ALARM_def_Function`,`site_def`.`Site_name` AS `Site_name`
from ((`alarm_site` join `alarm_def` on((`alarm_site`.`ALARM_def_ID` = `alarm_def`.`ALARM_def_ID`))) join `site_def` on((`alarm_site`.`Site_id` = `site_def`.`Site_id`)))
where (`alarm_site`.`ALARM_date` in (select * from  (select DISTINCT `ALARM_date`  from `alarm_site` order by alarm_date desc limit 30 ) as t2) )
group by `alarm_site`.`ALARM_def_ID`,`alarm_site`.`Site_id`,`alarm_site`.`ALARM_date`;

少一个括号！！！！，我用黑体给你标注出来了