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2010年2月22日

SQL取分组Top n条记录（转）

摘要： use NorthwindSelect *FROM orders AWhere EXISTS (Select COUNT(1) FROM orders Where employeeid = A.employeeid AND orderid > A.orderid HAVING COUNT(1) < 3)ORDER BY Em... 阅读全文

posted @ 2010-02-22 16:16 hao_2468 阅读(147) 评论(0) 推荐(0)