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标题: 请教sql语句 [打印本页]

作者: rtmx01    时间: 2006-10-25 18:43
标题: 请教sql语句
请教sql语句

select a.x1,a.x2,b.t1,b.t2

from (select x1,x2 from x) as a,(select (t1,t2 from t) as b

where a.x1=b.t1

该语句运行成功



select a.x1,a.x2,b.t1,b.t2

from (select x1,x2 from x) as a,(select (t1,t2 from t) as b

where a.x1=b.t1

group by b.t2

运行出错

请问怎么样修改
作者: sgrshh29    时间: 2006-10-25 19:53
不把为什么要group by b.t2的来龙去脉讲清楚,怎么改也是错的。
作者: rtmx01    时间: 2006-10-30 05:19
楼上高手,怎样才能说明白group by b.t2啊,我就是要按b.t2分组的啊




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