执行SQL语句SELECTsnogradeFROMSCWHEREcno＝'cl'ANDgrade-X题卡

已知关系模式scsnosnamegrade各属性含义依次为学号课程名分数要查找数据库课分数最高的学生

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

已知关系模式scsnosnamegrade各属性含义依次为学号课程名分数要查找数据库课分数最高的学生

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

已知关系模式scsnosnamegrade各属性含义依次为学号课程名分数要查找数据库课分数最高的学生

SELECT sno FROM sc WHERE sname = "数据库" AND grade = MAX(grade) SELECT sno FROM sc FOR sname = "数据库" OR grade＞=MAX(grade) SELECT sno FROM sc WHERE sname = "数据库" AND grade = (SELECT MAX(grade) FROM sc) SELECT sno FROM sc FOR sname = "数据库" OR grade = (SELECT MAX(grade) FROM sc)

已知关系模式scsnosnamegrade各属性含义依次为学号课程名分数要查找数据库课分数最高的学生

SELECT sno FROM sc WHERE sname="数据库"AND grade=MAX(grade) SELECT sno FROM sc FOR sname="数据库"OR grade>=MAX(grade) SELECT sno FROM sc WHERE sname="数据库"AND grade=(SELECT MAX (grade) FROM sc) SELECT sno FROM sc FOR sname="数据库" OR grade=(SELECT MAX (grade) FROM s

已知学生选课信息表scsnocnograde查询至少选修了一门课程但没有学习成绩的学生学号和课程号的

SELECT sno，cno FROM sc WHERE grade=NULL SELECT sno，cno FROM sc WHERE grade IS‘’ SELECT sno，cno FROM sc WHERE grade IS NULL SELECT sno，cno FROM sc WHERE grade=‘’

设有关系模式SCsnocnograde各属性含义依次是学号课程号分数要查询分数低于60分的学生学号正

SEI，ECT sno FROM SC WH ERE grade BETWEEN O AND 60 SELECT sno FROM SC WHERE grade＜60 SELECT sno FROM SC HAVlNG grade BETWEEN O AND 60 SELECT sno FROM SC HAVING grade＜60

已知关系模式scsnosnamegrade各属性含义依次为学号课程名分数要查找数据库课分数最高的学生

SELECT sno FROM SC WHERE sname="数据库"AND grade=MAX(grade) SELECT sno FROM SC FOR sname="数据库"OR grade＞MAX(grade) SELECT sno FROM SC WHERE shame="数据库"AND grade=(SELECT MAX(grade)FROM sc) SELECT son FROM SC FOR sname="数据库"OR grade=(SELECT MAX(grade. FROM sc)

已知关系模式scsnosnamegrade各属性含义依次为学号课程名分数要查找数据库课分数最高的学生

SELECT sno FROM sc WHERE sname = "数据库" AND grade = MAX(grade) SELECT sno FROM sc FOR sname = "数据库" OR grade＞=MAX(grade) SELECT sno FROM sc WHERE sname = "数据库" AND grade = (SELECT MAX(grade) FROM sc) SELECT sno FROM sc FOR sname = "数据库" OR grade = (SELECT MAX(grade) FROM sc)

学生—选课—课程数据库中的3个基本表学生信息表STUDENTsnosnamesexagedept主码

SELECT sno，cno FROM SC WHERE grade=NULI SELECT sno，cno FROM SC WHERE grade Is SELECT sno，cno FROM SC WHERE grade IS NULL SELECT sno，cno FROM SC WHERE grade="

学生选课信息表scsnocnograde主键为snocno从学生选课信息表中找出无成绩的元组的SQL

SELECT * FROM sc WHERE grade=NULL SELECT * FROM sc WHERE grade IS “ ” SELECT * FROM sc WHERE grade=‘ ’ SELECT * FROM sc WHERE grade IS NULL

23～24题基于以下说明设有三个关系学生关系SSNOSNAMEAGESEX分别代表学生的学号姓名年龄

SELECT sno FROM sc WHERE grade=NULL SELECT sno FROM sc WHERE grade IS SELECT sno FROM sc WHERE grade IS NULL SELECT sno FROM sc WHERE grade=0

已知关系模式SCsnosnamegrade各属性含义依次为学号课程名分数要查找数据库课分数最高的学生

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

已知学生选课信息表scsnocnograde查询至少选修了一门课程但没有学习成绩的学生学号和课程号的

SELECT sno，cno FROM sc WHERE grade=NULL SELECT sno，cno FROM sc WHERE grade IS‘’ SELECT sno，cno FROM sc WHERE grade IS NULL SELECT sno，cno FROM sc WHERE grade=‘’

有如下的SQL语句Ⅰ．SELECTsnameFROMsscWHEREgrade＜60Ⅱ．SELECT

Ⅰ和Ⅱ Ⅰ和Ⅲ Ⅱ和Ⅲ Ⅰ、Ⅱ和Ⅲ

已知关系模式SCsnosnamegrade各属性含义依次为学号课程名分数要查找数据库课分数最高的学生

SELECT sno FROM sc WHERE sname="数据库"AND grade=MAX(grade) SELECT sno FROM sc FOR sname="数据库"OR grade＞=MAX(grade) SELECT sno FROM sc WHERE sname="数据库"AND grade=(SELECT MAX(grade)FROM sc) SELECT sno FROM sc FOR sname="数据库"OR grade=(SELECT MAX(grade)FROM s

已知关系模式scsnosnamegrade各属性含义依次为学号课程名分数要查找数据库课分数最高的学生

SELECT sno FROM S WHERE sname="数据库"AN grade=MAX(grade) SELECT sno FROM S FOR sname="数据库"OR grade＞MAX(grade) SELECT sno FROM S WHERE shame="数据库"AN grade=(SELECT MAX(grade)FROM sc) SELECT son FROM S FOR sname="数据库"OR grade=(SELECT MAX(grade. FROM sc)

设有关系SCsnocnograde执行SQL语句SELECTsnoAVGgradeFROMSCGR

1 2 3 4

有如下的SQL语句Ⅰ．SELECTsnameFROMsscWHEREgrade＜60Ⅱ．SELECT

Ⅰ和Ⅱ Ⅰ和Ⅲ Ⅱ和Ⅲ Ⅰ、Ⅱ和Ⅲ

已知学生选课信息表scsnocnograde查询至少选修了一门课程但没有学习成绩的学生学号和课程号的

SELECT sno，cno FROM sc WHERE grade=NULL SELECT sno，cno FROM sc WHERE grade IS" SELECT sno，cno FROM sc WHERE grade IS NULL SELECT sno，cno FROM sc WHERE grade=''

已知关系模式:SCsnosnamegrade各属性含义依次为学号课程名分数要查找数据库课分数最高的学

SELECT sno FROM sc WHERE sname="数据库"AND grade=MAX(grade) SELECT sno FROM sc FOR sname="数据库"OR grade>=MAX(grade) SELECT sno FROM sc WHERE sname="数据库"AND grade=(SELECT MAX(grade)
FROM sC)

执行SQL语句：SELECT sno，grade FROM SC WHERE cno＝'cl' AND grade

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