SELECT *  FROM  Student  INNER JOIN  SC ON Student.Sno = SC.Sno语句可将Student与 SC连接起来。A对B错

SELECT *  FROM  Student  INNER JOIN  SC ON Student.Sno = SC.Sno语句可将Student与 SC连接起来。

A

B


参考解析

相关考题:

“SELECT * FROM Student INNER JOIN SCON Student.Sno = SC.Sno ”语句可将 Student 与 SC连接起来。( ) 此题为判断题(对,错)。

(40)查找学生姓名及其所选修课程号和成绩,正确的 SQL 语句是A)SELECT sname FROM student, SELECT cno,grade FROM sc WHERE student.sno =sc.snoB) FROM sname,cno,grade FROM student,course WHERE student.sno =course.cnoC) SELECT sname ,canme,grade FROM student,course,sc WHERE student.sno =sc.sno and sc.cno=course.cnoD) SELECT sname ,cno,grade FROM student,sc WHERE student.sno =sc.sno

对于教学数据库的三个基本表:S(Sno,Sname,Ssex),SC(Sno,Cno,Grade),C(Cno,Cname, Teacher),其中S为学生表,SC为学生选课表,C为课程表,则对于语句:检索至少选修LIU老师所授课课程中一门课程的女生姓名,SQL语句错误的是______。A) SELECT SnameFROM S,SC,CWHERE S.Sno=SC.Sno AND SC.Cno=C.Cno AND Teacher=‘LIU’AND Ssex=‘F’B) SELECT SnameFROM S WHERE Ssex=‘F’AND Sno IN(SELECT SnoFROM SCWHERE Cno IN(SELECT Cno FROM CWHERE Teacher=‘LIU’))C) SELECT SnameFROM S WHERE Ssex=‘F’AND EXISTS (SELECT*FROM SCWHERE SC.Sno=S.Sno AND EXISTS(SELECT*FROM CWHERE Teacher=‘LIU’))D) SELECT SnameFROM S WHERE Ssex=‘F’AND EXISTS(SELECT*FROM SCWHERE SC.Sno=S.Sno AND EXISTS(SELECT*FROM CWHERE C.Cno=SC.Cno AND Teacher=‘LIU’))

对于教学数据库的三个基本表:S(Sno,Sname,Ssex),SC(Sno,Cno,Grade),C(Cno,Cname, Teacher),其中S为学生表,SC为学生选课表,C为课程表,则对于语句:检索至少选修LIU老师所授课课程中一门课程的女生姓名,SQL语句错误的是______。A.SELECT Sname FROM S,SC,C WHERE S.Sno=SC.Sno AND SC.Cno=C.Cno AND Teacher=‘LIU’AND Ssex=‘F’B.SELECT Sname FROM S WHERE Ssex=‘F’AND Sno IN (SELECT Sno FROM SC WHERE Cno IN(SELECT Cno FROM C WHERE Teacher=‘LIU’))C.SELECT Sname FROM S WHERE Ssex=‘F’AND EXISTS (SELECT* FROM SC WHERE SC.Sno=S.Sno AND EXISTS (SELECT*D.SELECT Sname FROM S WHERE Ssex=‘F’AND EXISTS(SELECT* FROM SC WHERE SC.Sno=S.Sno AND EXISTS (SELECT*

下列程序执行后,结果中将包含____条记录。 SELECT STUDENT.学号,STUDENT.姓名 FROM STUDENT INNER JOIN SKB ON STUDENT.学号=SKB.学号 WHERE SKB.成绩 BETWEEN 80 AND 100A 2B 3C 4D 5

要求选出学生中平均成绩最高的人的学号,姓名和平均分,下列语句中正确的是_____A SELECT TOP 1 学号,姓名,平均分 FROM STUDENT,SKB.DBF ORDER BY 平均分B SELECT TOP 1 STUDENT.学号,STUDENT.姓名,AVG(SKB.成绩) AS 平均分FROM STUDENT INNER JOIN SKB.DBF WHERE STUDENT. 学号=SKB.学号 GROUP BY STUDENT.学号 ORDER BY 3 DESCC SELECT TOP 1 STUDENT.学号,STUDENT.姓名,AVG(SKB.成绩) AS 平均分FROM STUDENT INNER JOIN SKB.DBF ON STUDENT.学号=SKB.学号 GROUP BY STUDENT.学号 ORDER BY 3 DESCD SELECT TOP 1 PERCENT STUDENT.学号,STUDENT.姓名,AVG(SKB.成绩) AS 平均分 FROM STUDENT INNER JOIN SKB.DBF ON STUDENT.学号=SKB.学号 GROUP BY STUDENT.学号 ORDER BY 3 DESC

查询所修课程成绩都大于等于85分的学生的学号和姓名,正确的命令是( )。A.SELECT学号,姓名FROM student s WHERE NOT EXISTS (SELECT*FROM score se WHERE SC.学号=s.学号码AND成绩85)B.SELECT学号,姓名FROM student S WHERE NOT EXISTS (SELECT*FROM score sc WHERE SC.学号=s.学号码AND成绩=85)C.SELECT学号,姓名FROM student s,score sc WHERE s.学号=sc.学号AND成绩=85D.SELECT学号,姓名FROM student s,score sc WHERE S.学号=sc.学号AND ALL成绩=85

根据SQL标准,下面哪条语句与select min(age) from student等效?()A select age from student where age >= min(age)B select distinct age from student where age >= all min(age)C select distinct a.age from student a where a.ageD select distinct a.age from student a where a.age

根据SQL标准,查询表student(sno,sname,sex,dept)中所有学生的选修课程数,其中选修记录在表SC(sno,cno,grade)中,两表中sno为关联字段。下面哪条语句合适?()A select sno,count(cno) from SCB select sno,count(cno) from studentC select a.sno,count(cno) from student a left outer join SCD select a.sno,count(cno) from SC left outer join student a

根据SQL标准,要查询表student中所有年龄age小于所有学生的平均年龄的记录,下面哪条语句适用?()A select * from student where ageB select * from student having ageC select * from student a where a.ageD select * from student a where (select avg(b.age) from student b ) >= a.age

如下的SQL语句是用于查询“每个学生的选修课程数、总成绩、平均成绩”的不完整语句,请在空缺处填入正确的内容。SELECT Student.SNo, (1),SUM(Grade),AVG(Grade)FROM Student,GradeWHERE Student.SNo=Grade.SNo,GROUP BY (2);(1)

查找学生姓名及其所选修课程的课程号和成绩,正确的SQL语句是A.SELECT sname FROM student,SELECT cno,grade FROM sc WHERE student.sno=sc.snoB.SELECT sname,cno,grade FROM student,course WHERE student.sno=course.cnoC.SELECT sname,cname,grade FROM student,course,sc WHERE student.sno=sc.sno and sc.cno=course,cnoD.SELECT sname,cno,grade FROM student,sc WHERE student.sno=sc.sno

查询所修课程成绩都大于等于85分的学生的学号和姓名,正确的命令是( )。A.SELECT学号,姓名FROM student s WHERE NOT EXISTS (SELECT*FROM score se WHERE SC.学号=s.学号码AND成绩85) from= student= s= where= not= exists= score= sc==85)C.SELECT学号,姓名FROM student s,score sc WHERE s.学号=sc.学号AND成绩=85D.SELECT学号,姓名FROM student s,score sc WHERE S.学号=sc.学号AND ALL成绩=85

学生表:student(学号,姓名,性别,出生日期,院系)课程表:course(课程号,课程名,学时)选课成绩表:score(学号,课程号,成绩)其中出生日期的数据类型为日期型,学时和成绩为数值型,其他均为字符型。查询“计算机系’’学生的学号、姓名、学生所选课程的课程名和成绩,正确的命令是A.SELECT s.学号,姓名,课程名,成绩 FROM studentS,score SC,course C WHERE s.学号=sc.学号,sc.课程号=c.课程号,院系=‘计算机系’B.SELECT学号,姓名,课程名,成绩 FROM student S,score SC,course c WHERE s.学号=sc.学号AND sc.课程号=c.课程号AND院系=‘计算机系’C.SELECT s.学号,姓名,课程名,成绩 FROM(student s JOIN score sc ON s.学号=sc.学号). JOIN course c ON sc.课程号=c.课程号 WHERE院系=‘计算机系’D.SELECT学号,姓名,课程名,成绩 FROM(student s JOIN score sc‘ON s.学号=sc.学号) JOIN course c ON sc.课程号=c.课程号 WHERE院系=‘计算机系’

查询所修课程成绩都大于等于85分的学生的学号和姓名,正确的命令是A.SELECT学号,姓名FROM student s WHERE NOT EXISTS (SELECT*FROM score sc WHERE sc.学号=s.学号AND成绩85)B.SELECT学号,姓名FROM Student s WHERE NOT EXISTS (SELECT*FROM score sc WHERE sc.学号=s.学号AND成绩=85)C.SELECT学号,姓名FROM student s,score sc WHERE s.学号=sc.学号AND成绩=85D.SELECT学号,姓名FROM student s,score sc WHERE s.学号=sc.学号AND ALL成绩=85

试题基于如下三个关系,其中学生关系student的主码是sno,课程关系course的主码是cno,选课关系SC的主码是(sno,cno)。查找学生姓名及其所选修课程的课程号和成绩,正确的SQL语句是( )。A)SELECT sname FROM student,SELECT cno,grade FROM scWHERE student.sno=sc.snoB)SELECT sname, cno,grade FROM student,courseWHERE student.sno=course.cnoC)SELECT sname, cname,grade FROM student,course, scWHERE student.sno=sc.Snoand sc.cno=course.cnoD)SELECT sname,cno, grade FROM student,scWHERE student.sno=sc.sno

根据以下资料,回答下列各题: 使用如下三个数据库表: 学生表:student(学号,姓名,性别,出生日期,院系) 课程表:course(课程号,课程名,学时) 选课成绩表:score(学号,课程号,成绩) 其中出生日期的数据类型为日期型,学时和成绩为数值型,其他均为字符型。 查询“计算机系”学生的学号、姓名、学生所选课程名和成绩,正确的命令是( )。A.SELECT s.学号,姓名,课程名,成绩 FROM student s,score sc。course c WHERE s.学号=sc.学号,sc.课程号=c.课程号,院系="计算机系"B.SELECT学号,姓名,课程名,成绩 FROM student s,score sc,course C WHERE s.学号=SC.学号AND sc.课程号=c.课程号AND院系="计算机系"C.SELECT s.学号,姓名,课程名,成绩 FROM(student s JOIN score sc ON s.学号=sc.学号) JOIN course c ON sc.课程号=c.课程号 wHERE院系="计算机系"D.SELECT学号,姓名,课程名,成绩 FROM(student s JOIN score sc ON s.学号=sc.学号) JOIN course c ON sc.课程号=c.课程号 WHERE院系="计算机系"

设Student为学生关系,SC为学生选课关系,Sno为学生号,Sname为学生姓名,Cno为课程号,执行下列SQL语句的查询结果是( )。Select Student.SnameFrom Student,SCWhere Student.Sno=SC.SnoAnd SC.Cno='C1’A.选出选修C1课程的学生信息B.选出选修C1课程的学生姓名C.选出Student中学生号与SC中学生号相等的信息D.选出Student和SC中的一个关系

已知有关系“STUDENT”,则关系运算σANE<80(STUDENT)用SQL语句表示为(52)。A.SELECT( * )FROM STUDENT WHERE AVE < 80B.SELECT( * )FROM STUDENT HAVING AVE < 80C.SELECT(AVE)FROM STUDENT WHERE AVE < 80D.SELECT(AVE) FROM STUDENT HAVING AVE < 80

查询student表中的所有非空email信息,以下语句正确的是()。A、Select email from student where email !=nullB、Select email from student where email not is nullC、Select email from student where email nullD、Select email from student where email is not null

SELECT *  FROM  Student  INNER JOIN  SC ON Student.Sno = SC.Sno语句可将Student与 SC连接起来。

查询student表中的所有非空email信息,以下语句正确的是()A、Select email from student where email!=nullB、Select email from student where emailnotisnullC、Select email from student where emailnullD、Select email from student where emailisnotnull

在Transact-SQL语法中,以下SELECT语句正确的是()。A、SELECT * FROM studentB、SELECT * FROM student WHERE GETDATE()C、SELECT * FROM student ORDER st_idD、SELECT * FROM student BY St_name

"SELECT Student.姓名,Scores.成绩 FROM Student INNER JOIN Scores ON Student.学号=Scores.学号"语句的意思是()A、连接查询Student表和Scores表B、复制Student表C、复制Scores表D、这是一条错误语句,毫无意义

单选题查询“计算机系”学生的学号、姓名、学生所选课程的课程名和成绩,正确的命令是(  )。ASELECT s.学号,姓名,课程名,成绩FROM student s,score sc,course eWHERE s.学号=sc.学号,sc.课程号=c.课程号,院系='计算机系'BSELECT学号,姓名,课程名,成绩FROM student s,score sc,course cWHERE s.学号=sc.学号AND sc.课程号=c.课程号AND院系='计算机系'CSELECT s.学号,姓名,课程名,成绩FROM(student s JOIN score se ON s.学号=sc.学号)JOIN course c ON sc.课程号=c.课程号WHERE院系='计算机系'DSELECT学号,姓名,课程名,成绩FROM(student s JOIN score sc ON s.学号=sc.学号)JOIN course c ON sc.课程号=c.课程号WHERE院系='计算机系'

单选题"SELECT Student.姓名,Scores.成绩 FROM Student INNER JOIN Scores ON Student.学号=Scores.学号"语句的意思是()A连接查询Student表和Scores表B复制Student表C复制Scores表D这是一条错误语句,毫无意义

判断题SELECT *  FROM  Student  INNER JOIN  SC ON Student.Sno = SC.Sno语句可将Student与 SC连接起来。A对B错