奇怪的sql关联语句问题 我今天写了一个不是很复杂的关联语句 如下: select * from ( SELECT DATE1,ccarnumber as c1 FROM ( select max([CREVIEWDATE]) AS DATE1,ccarnumber from ( select [CREVIEWDATE],ccarnumber from [CRM_MEMREVIEW] where [CREVIEWMODE]='10' )A GROUP BY ccarnumber ) S ) T1 JOIN (SELECT date1 as date2,ccarnumber as c2 FROM ( select max([CREVIEWDATE]) as date1,ccarnumber from [CRM_MEMREVIEW] GROUP BY ccarnumber )S ) T2 ON T1.DATE1=T2.date2 AND T1.c1=T2.c2