5>...Select 5-1>选择列,5-2>distinct
1>…From 表
2>…Where 条件
3>…Group by 列
4>…Having 筛选条件
6>…Order by 列
7>...Top
 
posted on 2013-03-26 18:22  chay  阅读(205)  评论(0编辑  收藏  举报