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if exists(select * from sysobjects where name=‘view_stuInfo_stuMarks‘) drop view view_stuInfo_stuMarks go create view view_stuInfo_stuMarks as select 姓名=stuName,学号=stuInfo.stuNo,笔试成绩＝writtenExam,机试成绩=labExam,平均分＝（writtenExam+labExam）/2 from stuInfo left join stuMarks on stuInfo.stuNo=stuMarks.stuNo go select * from view_stuInfo_stuMarks
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原文地址：http://www.cnblogs.com/beast-king/p/4522695.html
