你可能感兴趣的试题
(Sno,Tno)和{Cno,Cname,Grade,Tno,Tname} (Sno, Cno, Tno)和{Sno, Sname, Sex, Birthday, Cno} (Sno, Cno)和{Sno, Sname, Sex, Birthday, Cno, Cname, Grade} (Sno, Cno, Tno)和{Sno, Sname, Sex, Birthday, Tno, Tname}
(Sno,Tno)和Cno,Cname,Grade,Tno,Tname (Sno, Cno,Tno) 和Sno, Sname, Sex, Birthday, Cno (Sno, Cno)和Sno, Sname, Sex, Birthday, Cno, Cname, Grade (Sno, Cno,Tno)和Sno, Sname, Sex, Birthday, Tno, Tname
1 个,为(Sno,Cno) 1 个,为(Sno,Cno,Tname) 2 个,为(Sno,Sname,Cno)和(Sno,Cno,Tname) 2 个,为(Sno,Sname,Cno)和(Sname,Cno,Tname)
1个,为 (Sno, Cno) 1个,为 (Sno, Cno, Tname) 2个,为 (Sno, Sname, Cno) 和 (Sno, Cno, Tname) 2个,为 (Sno, Sname, Cno) 和 (Sname, Cno, Tname)
(Sno,Sname,Cno,Tname,Taddr),(Sno,Sname,Cno,Cname,Grade)∈1NF (Sno,Sname),(Sno ,Cno ,Grade,Tname,Taddr),(Cno,Cname)∈2NF (Sno ,Sname),(Sno ,Cno ,Grade),(Tname,Taddr),(Cno ,Cname,)∈3NF (Sno,Sname),(Sno,Cno,Grade),(Tname,Taddr),(Tname,Cno),(Cno,Cname)∈BCNF
1个,为(Sno,Cno) 1个,为(Sno,Cno,Tname) 2个,为(Sno,Sname,Cno)和(Sno,Cno,Tname) 2个,为(Sno,Sname,Cno)和(Sno,Cno,Tnam
(Sno,Tno)和{Cno,Cname,Grade,Tno,Tname} (Sno, Cno,Tno) 和{Sno, Sname, Sex, Birthday, Cno} (Sno, Cno)和{Sno, Sname, Sex, Birthday, Cno, Cname, Grade} (Sno, Cno,Tno)和{Sno, Sname, Sex, Birthday, Tno, Tname}
{(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、
(Sno,Sname,Cno,Tname,Taddr),(Sno,Sname,Cno,Cname,Grade)为1NF (Sno,Sname),(Sno,Cno,Grade,Tname,Taddr),(Cno,Cname)为2NF (Sno,Sname),(Sno,Cno,Grade),(Tname,Taddr),(Cno,Cname))为3NF (Sno,Sname),(Sno,Cno,Grade),(Tname,Taddr),(Tname,Cno),(Cno,Cname)为BCNF、
(Sno,Tno)和Cno,Cname,Grade,Tno,Tname (Sno,Cno,Tno)和Sno,Sname,Sex,Birthday,Cno (Sno,Cno)和Sno,Shame,Sex,Birthday,Cno,Cname,Grade (Sno,Cno,Tno)和Sno,Sname,Sex,Birthdayr,Tno,Tname
{(Sno, Sname, Cno, Tname, Taddr), (Sno, Sname, Cno, Cname, Grade) } ∈ 2NF {(Sno, Shame), (Sno, Cno, Grade, Tname, Taddr), (Cno, Cname)}∈ 2NF {(Sno, Sname), (Sno, Cno, Grade), (Tname, Taddr), (Cno, Cname) } ∈ 3NF {(Sno, Sname), (Sno, Cno, Grade), (Tname, Taddr), (Tname, Cno), (Cno, Cname)}∈3NF
1个,为 (Sno, Cno) 1个,为 (Sno, Cno, Tname) 2个,为 (Sno, Sname, Cno) 和 (Sno, Cno, Tname) 2个,为 (Sno, Sname, Cno) 和 (Sname, Cno, Tname)
{(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,Grade))∈1NF (Sno,Sname),(Sno,Cno,Grade,Tname,Taddr),(Cno,Cname))∈2NF (Sno,Sname),(Sno,Cno,Grade),(Tname,Taddr),(Cno,Cname))∈3NF f(Sno,Sname),(Sno,Cno,Grade),(Tname,Taddr),(Tname,Cno),(Cno,Cname))∈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