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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
在Group子名的下一行加入： Having Avg(*)＞80 在Group子名的下一行加入： Having AVG(grad＞80 在Group子名的下一行加入： Where AVG(grad＞80 在Group子名的下一行加入： Where AVG(*)＞80
安全模式已建立情况下，启动重建流程； 安全模式已建立情况下，回 IDLE； 安全模式未建立情况下，启动重建流程； 不重建，触发 SCG failure 后，向MCG上报SCGFailureInformationNRmessage 。
Select C#，AVG(grade) From SCG Group by grade Order by 2，C# Desc Select C#，AVG(grade) From SCG Group by C# Order by 2，C# Desc Select C#，AVG(grade) From SCG Where C#，AVG Desc Group by grade Select C#，AVG(grade) From SCG Group by AVG(grade) Order by 2，C# Desc
安全模式已建立情况下，启动重建流程； 安全模式已建立情况下，回 IDLE； 安全模式未建立情况下，启动重建流程； 不重建，触发SCG failure 后，向 MCG上报SCGFailureInformationNRmessage 。
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，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
{(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
安全模式已建立情况下，启动重建流 安全模式已建立情况下，回 IDLE； 安全模式未建立情况下，启动重建流 不重建，触发 SCG failure后，向MCG上报SCGFailureInformationNRmessage
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