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S.S#=SS# AND SEX='女'AND CNAME='计算机' S.S#=SS# AND C.C#=SC# AND CNAME='计算机' SEX='女'AND CNAME='计算机' S.S#=SC S# AND C#=SC# AND SEX='女'AND CNAME='计算机'
S#=SS# AND SEX=‘男’AND CNAME=‘计算机文化’ S#=SS# AND C#=SC# AND CNAME=‘计算机文化’ SEX=‘女’AND CNAME=‘计算机文化’ S#=SS# AND C#=SC# AND SEX=‘男’AND CNAME=‘计算机文化’
SELECT S#,SNAME FROM S WHERE S# =(SELECT SS#FROM SC WHERE C#=‘C2’ SELECT S#,SNAME FROM S,SC WHERE S#=SS# AND C#=‘C2’) SELECT S#,SNAME FROM S,SC WHERE S#=SS# AND C#=‘C2 ORDER BY S# SELECT S#,SNAME FROM S WHERE S# IN(SELECT SS# FORM SC WHERE C#=‘C2’)
S#=SS#='男'and Cname='计算机文化' S#=SS# and C#=SC# and Cname='计算机文化' S#=SS# and C#=SC# and Sex='男'and Cname='计算机文化' Sex'女'and Cname='计算机文化'
S#=SC.S# AND SEX=‘女’AND CNAME=‘计算机’ S#=SC.S# AND C.C#=SC# AND CNAME=‘计算机’ SEX=‘女’AND CNAME=‘计算机’ S#=SC.S# AND C.C#=SC# AND SEX=‘女’AND CNAME='计算机’
S,S#=SS# AND SEX='女'AND CNAME='计算机' S,S#=SS# AND CC#=SC# AND CNAME='计算机' SEX='女'.AND CNAME='计算机' S#=SS# ANDC#=SC# AND SEX='女'AND CNAME='计算机'
S.S#=SS#=’男’andCname=’计算机文化’ S.S#=SS#andC#=SC#andCname=’计算机文化’ S.S#=SS#andC#=SC#andSex=’男’andCname=’计算机文化’ Sex=’女’andCname=’计算机文化’
S#=SC.S# AND SEX=‘女’AND CNAME=‘计算机’ S#=SC.S# AND C.C#=SC.C# AND CNAME=‘计算机’ SEX=‘女’AND CNAME=‘计算机’ S#=SC.S# AND C.C#=SC.C# AND SEX=‘女’AND CNAME='计算机’
S#=SS#='男' and Cname='计算机文化' S#=SS# and C#=SC# and Cname='计算机文化' S#=SS# and C# SC# and Sex='男' and Cname='计算机文化' Sex'女' and Cname='计算机文化'
S#=SS#AND C#=SC#AND SEX='男'AND CNAME='数据库' S#=SS#AND C#=SC#AND SEX in'男'AND CNAME IN'数据库' SEX'男'AND CNAME'数据库' SEX='男'AND CNAME='数据库'
{(Sno,Sname,Cno,Tname,Tadd,(Sno,Sname,Cno,Cname,Grad)属于2NF {(Sno,Snam,(Sno,Cno,Grade Tname,Tadd,(Cno,Cnam}属于2NF {(Sno,Snam,(Sno,Cno,Grad,(Tname,Tadd,(Cno,Cnam}属于3NF {(Sno,Snam,(Sno,Cno,Grad,(Tname,Tadd,(Tname,Cn,(Cno,Cnam}属于3NF
(Sno,Sname,Cno,Tname,Taddr),(Sno,Sname,Cno,Cname,Grad为1NF (Sno,Snam,(Sno,Cno,Grade,Tname,Taddr),(Cno,Cnam为2NF (Sno,Snam,(Sno,Cno,Grad,(Tname,Taddr),(Cno,Cnam)为3NF (Sno,Snam,(Sno,Cno,Grad,(Tname,Taddr),(Tname,Cno),(Cno,Cnam为BCNF、
S.S#=SS#AND SEX='男'AND CNAME='计算机文化' S.S#=SS#AND C.C#=SC.C#AND CNAME='计算机文化' SEX='女'AND CNAME='计算机文化' S.S#=SC.S#AND C.C#=SC.C#AND SEX='男' AND CNAME='计算机文化'
S.S#= SS# and SEX="女"and CNAME="计算机" S.S#= SS# AND C#=SC# and CNAME="计算机" SEX="女"and CNAME="计算机" S.S#= SS# and C#= SC# and SEX="女"and CNAME="计算机/
S#=SS# AND C#=SC# AND CNAME=‘数据库’ S#=SS# AND C#=SC# AND CNAME IN‘数据库’ CNAME‘数据库’ CNAME=‘数据库’
S.S#=SC.S# AND SEX=‘男’AND CNAME=‘计算机文化’ S.S#=SC.S# AND C.C#=SC.C# AND CNAME=‘计算机文化’ SEX=‘女’AND CNAME=‘计算机文化’ S.S#=SC.S# AND C.C#=SC.C# AND SEX=‘男’AND CNAME=‘计算机文化’
{(Sno,Sname,Cno,Tname,Tadd,(Sno,Sname,Cno,Cname,Grad}∈1NF {(Sno,Snam,(Sno,Cno,Grade,Tname,Tadd,(Cno,Cnam}∈i2NF {(Sno,Snam,(Sno,Cno,Grad,(Tname,Tadd,(Cno,Cname,)∈3NF {(Sno,Snam,(Sno,Cno,Grad,(Tname,Tadd,(Tname,Cn,(Cno,Cnam}∈BCNF
(Sno,Sname,Cno,Tname,Taddr),(Sno,Sname,Cno,Cname,Grad属于1NF (Sno,Snam,(Sno,Cno,Grade,Tname,Taddr),(Cno,Cnam属于2NF (Sno,Snam,(Sno,Cno,Grad,(Tname,Taddr),(Cno,Cnam属于3NF (Sno,Snam,(Sno,Cno,Grad,(Tname,Taddr),(Tname,Cno),(Cno,Cnam属于BCNF
S#=SS#='男'and Cname='计算机文化' S#=SS# and C#=SC# and Cname='计算机文化' S#= SS# and C# SC# and Sex='男' and Cname='计算机文化' Sex'女' and Cname= '计算机文化'
S.S#=SS#ANDSEX="女"ANDCNAME="计算机" S.S#=SS#ANDC#=SC#ANDCNAME="计算机" SEX="女"ANDCNAME="计算机" S.S#=SS#ANDC#=SC#ANDSEX="女"ANDCNAME="计算机“