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                         1.相关数据表 Score表  <IMG src="https:https://files.jb51.cc/file_images/article/201405/20140515161550.jpeg?2014415161612"> [User]表  <IMG src="https:https://files.jb51.cc/file_images/article/201405/20140515161635.jpeg?2014415161655"> SQL语句如下:  <div class="codetitle"><a style="CURSOR: pointer" data="26496" class="copybut" id="copybut26496" onclick="doCopy('code26496')"> 代码如下:<div class="codebody" id="code26496">  --查询出各科成绩最好的学生信息  --自连接  --SELECT TOP 1 * FROM Score B WHERE B.ScoreName = '数学' ORDER BY B.Score DESC SELECT A.ID,U.Name,A.ScoreName,A.Score  FROM Score A,[User]U  WHERE UID IN (SELECT TOP 1 UID  FROM Score B  WHERE B.ScoreName = A.ScoreName  ORDER BY B.Score DESC) AND A.UID=U.ID  ORDER BY A.ScoreName,A.Score DESC    查询结果如下图:  <IMG src="https:https://files.jb51.cc/file_images/article/201405/20140515161723.jpeg?2014415161747">                         (编辑:莱芜站长网) 
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