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Useful-SQL-statement
- 十分有用的SQL语句, select a.S# from (select s#,score from SC where C#= 001 ) a,(select s#,score from SC where C#= 002 ) b where a.score>b.score and a.s#=b.s#-Useful SQL statement select a.S# from (select s#,score from SC where C#= 001 ) a,(