DELETE FROM S WHERE年龄>60语句的功能是( )。
A.从S表中彻底删除年龄大于60岁的记录
B.S表中年龄大于60岁的记录被加上删除标记
C.删除S表
D.删除S表的年龄列
A.从S表中彻底删除年龄大于60岁的记录
B.S表中年龄大于60岁的记录被加上删除标记
C.删除S表
D.删除S表的年龄列
第1题
A.DELETE FROM 图书 FOR 图书号 LIKE"A%"
B.DELETE FROM 图书 WHILE 图书号 LIKE"A%"
C.DELETE FROM 图书 WHERE 图书号="A*"
D.DELETE FROM 图书 WHERE 图书号 LIKE"A%"
第2题
A.从SSS表删除年龄大于60岁的记录
B.在SSS表中创建一条年龄60的记录
C.删除SSS表中所有列
D.删除SSS表的年龄列
第3题
A.She’s in England.
B.She’s from London.
C.She’s a nurse in England.
D.She is English.
第4题
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分的学生的学号、姓名和性别,正确的是( )。
A.SELECT 学号,姓名,性别 FROM S WHERE EXISTS;
(SELECT*FROM SC WHERE SC.学号=S.学号 AND 成绩<=85)
B.SELECT 学号,姓名,性别 FROM S WHERE NOT EXISTS;
(SELECT * FROM SC WHERE SC.学号=S.学号 AND 成绩<=85)
C.SELECT 学号,姓名,性别 FROM S WHERE EXISTS;
(SELECT * FROM SC WHERE SC.学号=S.学号 AND 成绩>85)
D.SELECT 学号,姓名,性别 FROM S WHERE NOT EXISTS;
(SELECT * FROM SC WHERE SC.学号=S.学号 AND 成绩<85)
第5题
Where might this passage come from?
A.A doctor’s notebook.
B.A diary.
C.A magazine.
D.A school biology book.
第6题
A.SELECT SN,SEX FROM S WHERE AGE>(SELECT AGE FROM S WHERE SN=“李丽”)
B.SELECT SN,SEX FROM S WHERE SN=“李丽”
C.SELECT SN,SEX FROM S WHERE AGE>(SELECT AGE WHERE SN=“李丽”)
D.SELECT SN,SEX FROM S WHERE AGE>李丽.AGE
第7题
Where might this passage come from?
A.A doctor's notebook.
B.A diary.
C.A magazine:
D.A school biology book.
第8题
第9题
B.Don’t you have a book?
C.I want to go to the park.
D.Where do you come from?
第10题
有如下3个关系表:
S(S#,SN,SEX,AGE,DEPT)
C(C#,CN)
SC(S#,C#,GRADE)
其中,S#为学号,SN为姓名,SEX为性别,AGE为年龄,DEPT为系别,C#为课程号,
CN为课程名,GRADE为成绩。检索所有比“王华”年龄大的学生的姓名、年龄和性别。
正确的SELECT语句是( )。
A.SELECT SN,AGE,SEX FROM S;
WHERE AGE>(SELECT AGE FROM S WHERE SN='王华')
B.SELECT SN,AGE,SEX FROM S WHERE SN='王华'
C.SELECT SN,AGE,SEX FROM S
WHERE AGE>(SELECT AGE WHERE SN='王华')
D.SELECT SN,AGE,SEX FROM S WHERE AGE>王华 AGE