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SELECT sno FROM sc WHERE sname="数据库"AND grade=MAX(grad SELECT sno FROM sc FOR sname="数据库"OR grade＞=MAX(grad SELECT sno FROM sc WHERE sname="数据库"AND grade=(SELECT MAX(grad FROM s SELECT sno FROM sc FOR sname="数据库"OR grade=(SELECT MAX(grad FROM s
SELECT sno FROM sc WHERE sname="数据库"AND grade=MAX(grad SELECT sno FROM sc FOR sname="数据库"OR grade>=MAX(grad SELECT sno FROM sc WHERE sname="数据库"AND grade=(SELECT MAX (grad FROM s SELECT sno FROM sc FOR sname="数据库" OR grade=(SELECT MAX (grad FROM s
SELECT S#, SUM(GRAD FROM SC WHERE GRADE＞=60 GROUP BY S# ORDER BY 2 DESC HAVING COUNT(*)＞=4 SELECT S#, SUM(GRAD FROM SC WHERE GRADE＞=60 GROUP BY S# HAVING COUNT(*)＞=4 ORDER BY 2 DESC SELECT S#, SUM(GRAD FROM SC WHERE GRADE＞=60 HAVING COUNT(*)＞=4 GROUP BY S# ORDER BY 2 DESC SELECT S#, SUM(GRADFROM SC WHERE GRADE＞=60 ORDER BY 2 DESC GROUP BY S# HAVING COUNT(*)＞=4
SELECT Sno，AVG(Grad FROM SC WHERE AVG(Grad＞=90 GROUP BY Sno SELECT Sno，AVG(Grad FROM SC GROUP BY Sno HAVING AVG(Grad＞=90 SELECT Sno，AVG(Grad FROM SC WHERE AVG(Grad＞=90 ORDER BY Sno SELECT Sno，AVG(Grad FROM SC GROUP BY Cno HAVING AVG(Grad＞=90
INSERT INTO SC(SNO, CNO, GRAD VALUES('S101', 'C11', '98') INSERT INTO SC(SNO, CNO, GRAD VALUES(S101, C11, 98) INSERT('Sl01', 'C11', '98')INTO SC INSERT INTO SC VALUES('S101', 'C11', 98)
Select C#，AVG(grad From SCG Group by grade Order by 2，C# Desc Select C#，AVG(grad From SCG Group by C# Order by 2，C# Desc Select C#，AVG(grad From SCG Where C#，AVG Desc Group by grade Select C#，AVG(grad From SCG Group by AVG(grad Order by 2，C# Desc
{(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、
SELECT sno FROM sc WHERE sname="数据库"AND grade=MAX(grad SELECT sno FROM sc FOR sname="数据库"OR grade＞=MAX(grad SELECT sno FROM sc WHERE sname="数据库"AND grade=(SELECT MAX(gradFROM s SELECT sno FROM sc FOR sname="数据库"OR grade=(SELECT MAX(gradFROM s
which; whose which; of which when; whose on which, its
through its Research and Education Network, which will transmit the 3 -D images and data back to the hospital for evaluation and image manipulation. The doctors will then give feedback about how well the network works and the quality of the images. In a virtual hospital, medical professionals will work at the real hospital. at NASA’s Research and Education Network. the World Wide Web. at a special workstation at hom
{(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
at the real hospital. at NASA’s Research and Education Network. the World Wide Web. at a special workstation at home.
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