_________,where’s the classroom?

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Where Where’s Where’re Where are

查询选修了课程号为C1的学生的姓名和年龄若用下列SQL的SELECT语句表达时错误的是

SELECT SNAME，AGE FROM S WHERE S．S#=(SELECT S S#FROM SC WHERE C#='C1') SELECT SNAME，AGE FROM S，SC WHERE S．S#=S S# AND S C#='C1' SELECT SNAME，AGE FROM S，SC WHERE S．S#=S S# AND S C#='C1' ORDERBY S．S# SELECT SNAME，AGE FROM S WHERE

查询选修了课程号为C2的学生号和姓名若用下列SQL的SELECT语句表达时是错误的

SELECT S.S#，SNAME FROM S WHERE S.S# =(SELECT SC.S#FROM SC WHERE C#='C2') SELECT S.S#，SNAME FROM S，SC WHERE S.S#=SC.S# AND C#='C2' SELECT S.S#，SNAME FROM S，SC WHERE S.S#=SC.S# AND C#='C2' ORDER BY S.S# SELEC S.S#，SNAME FROM S WHERE S.S# IN(SELECT SC.S# FROM SC WHERE C#='C2')

查询选修了课程号为MATHS的学生的姓名和年龄若用下列SQL的SELECT语句表达时错误的是

SEIECT SNAME, ADE FROM S WHERE S#=(SELECT S S# FROM SC WHERE C#='MATHS') SELECT SNAME, AGE FROM S WHERE S#=(SELECT S S# FROM SC WHERE S C#='MATHS') SELECT SNAME, AGE FROM S, SC WHERE S#=SS# AND S C#='MATHS' ORDER BY S# SELECT SNAME, AGE FROMS, SC WHERE S#=SS# AND SC#='MATHS'

查询选修了课程号为'C2'的学生号和姓名若用下列SQL的SELECT语句表达时错误的是

SELECT S.S#，SNAME FROM S WHERE S.S#
=(SELECT SC.S# FROM SC WHERE C#='C2')  SELECT S.S#,SNAME FROM S，SC
WHERE S.S#==SC.S# AND C#='C2'  SELECT S.S#，SNAME FROM S，SC
WHERE S.S#=SC.S# AND C#='C2' ORDER BY S.S#  SELECT S.S#，SNAME FROM S WHERE S.S
IN (SELECT SC.S## FROM SC WHERE C#='C2')

单项选择—thekeys?—onthebeD.

Where is; It’s　　　 Where are;They’re Where’s;They’re　 Where are;It’s

查询选修了课程号为'C2'的学生号和姓名若用下列SQL的SELECT语句表达时错误的是

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## FROM SC WHERE C#='C2')

查询选修了课程号为'C2'的学生号和姓名若用下列SQL的SELECT语句表达时错误的是

SELECT S.S#，SNAME FROM S WHERE S.S# =(SELECT SC.S# FROM SC WHERE C#='C2') SELECT S.S#,SNAME FROM S，SC WHERE S.S#==SC.S# AND C#='C2' SELECT S.S#，SNAME FROM S，SC WHERE S.S#=SC.S# AND C#='C2' ORDER BY S.S# SELECT S.S#，SNAME FROM S WHERE S.S IN (SELECT SC.S## FROM SC WHERE C#='C2')

查询选修了课程号为C2的学生号和姓名若用下列SQL的SELECT语句表达时错误的是

SELECT S.S#，SNAME FROM S WHERE S.S#
=(SELECT SC.S# FROM SC WHERE C#='C2')  SELECT S.S#，SNAME FROM S，SC
WHERE S.S#=SC.S# AND C#='C2'  SELECT S.S#，SNAME FROM S，SC
WHERE S.S#=SC.S# AND C#='C2' ORDER BY S.S#  SELECT S.S#，SNAME FROM S WHERE S.S
IN (SELECT SC.S# FROM SC WHERE C ＝'C2')

设有s学号姓名性别和sc学号课程号成绩两个表如下SQL语句检索选修的每门课程的成绩都高于或等于85分

SELECT 学号，姓名，性别 FROM S WHERE EXISTS (SELECT * FROM SC WHERE S学号=学号 AND 成绩＜=85) SELECT 学号，姓名，性别 FROMS WHERE NOT EXISTS (SELECT * FROM SC WHERE S学号=学号 AND 成绩＜=85) SELECT 学号，姓名，性别 FROMS WHERE EXISTS (SELECT * FROM SC WHERE S学号=学号 AND 成绩＞85) SELECT 学号，姓名，性别 FROM S WHERE NOT EXISTS (SELECT * FROM SC WHERE S学号=学号AND成绩＜85)

查询选修了课程号为'C2'的学生号和姓名若用下列SQL的SELECT语句表达时是错误的

SELECT S#,SNAME FROM S WHERE S# =(SELECT SS# FROM SC WHERE C#='C2') SELECT S#,SNAME FROM SC WHERE S#=SS# AND C#='C2' SELECT S#,SNAME FROM SC WHERE S#=SS# AND C#='C2'ORDER BY S# SELECT S#,SNAME FROM S WHERE S# IN(SELECT SS#FROM SC WHERE C#='C2')

查询选修了课程号为'C2'的学生号和姓名若用下列SQL的SELECT语句表达时是错误的

SELECT S.S#,SNAME FROM S WHERE S.S#
=(SELECT SC.S# FROM SC WHERE C#='C2')  SELECT S.S#,SNAME FROM S.SC
WHERE S.S#=SC.S# AND C#='C2'  SELECT S.S#,SNAME FROM S.SC
WHERE S.S#=SC.S# AND C#='C2'ORDER BY S.S#  SELECT S.S#,SNAME FROM S WHERE S.S#
IN(SELECT SC.S#FROM SC WHERE C#='C2')

查询选修了课程号为C2的学生号和姓名若用下列SQL的SELECT语句表达时哪一个是错误的

SELECT S#，SNAME FROM S WHERE S# (SELECT S S# FROM SC WHERE C#='C2') SELECT S#，SNAME FROMS，SC WHERE S#=SS# AND C#='C2' SELECT S#，SNAME FROM S,SC WHERE S=SS# AND C#='C2'ORDER BY S#． SELECTS#，SNAME FROM S WHERE S# IN(SELECT S S# FROM SC WHERE C#='C2')

—________mybaseball?—It’sunderthechair.

Where Where’s What’s Where are

查询选修了课程号为MATHS的学生的姓名和年龄若用下列SQL的SELECT语句表达时错误的是

SELECT SNAME,AGE FROM S WHERE S.S#=(SELECT SC.S#FROM SC WHERE C.C#='MATHS') SELECT SNAME,AGEFROM SWHERE S.S#=(SELECT SC.S#FROM SC WHERE SC.C#='MATHS') SELECT SNAME,AGE FROM S, SC WHERE S.S#=SC.S# AND SC.C#='MATHS' ORDER BY S.S# SELECT SNAME,AGE FROM S, SC WHERE S.S#=SC.S# AND SC.C#='MATHS'

查询选修了课程号为C2的学生号和姓名若用下列SQL的SELECT语句表达时错误的是

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# FROM SC WHERE C ＝'C2')

设有关系RABC和SCD与关系代数表达式πABDσR.C=S.CR×S等价的SQL语句是

SELECT*FROM R,S WHERE R.C=S.C SELECT A,B,D FROM R,S WHERE R.C=S.C SELECT A,B,D FROM R,S WHERE R=S SELECT A,B FROM R WHERE(SELECT D FROM S WHERE R.C=S.

查询选修C2课程号的学生姓名下列SQL语句中错误的是______

SELECT姓名FROM S WHERE EXISTS(SELECT*FROM SC WHERE学号=S.学号AND课程号=’C2’) SELECT姓名FROM S WHERE学号IN(SELECT学号FROM SC WHERE课程号=’C2’) SELECT姓名FROM S JOIN SC ON S.学号=SC.学号WHERE课程号=’C2’ SELECT姓名FROM S WHERE学号=(SELECT学号FROM SC WHERE课程号=’C2’)

—Where’smydictionary?—It’s_____youleftit.

when there where there where

若要求查找年龄大于18岁学生的学生号和姓名正确的SQL语句是

SELECT S#，SNAME FROM S WHERE AGE＞18 SELECT S#，SNAME FROM S WHERE AGE＞=18 SELECT S#，SNAME FROM S WHERE AGE＞'18' SELECT S#，SNAME FROM S WHERE AGE＞='18'

_________,where’s the classroom?

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