SQL Server.第 三章

一，公示表表达式 with sumscore(学号,总成绩) as (     select stuid,SUM(score)     from StuMarks     group by stuid )     select * from sumscore   with sscore(学号,姓名,总成绩) as (     select StuInfo.stuid,stuname,SUM(sco

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