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[单选题]
()the age of eight, he had performed in half the great cities of Europe.
A.After
B.In
C.On
D.By
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A.After
B.In
C.On
D.By
A、Short-term ordinary loss
B、Short-term capital gain
C、Short-term capital loss
D、Long-term ordinary gain
E、Long-term capital gain
A. DELETE Age from S
B. ALTER TABLE S DROP Age
C. UPDATE S Age
D. ALTER TABLE S ‘Age’
A.flight code
B.boarding gate
C.seat number
D.age
设有如下关系表R:
R(NO,NAME,SEX,AGE,CLASS)
主关键字是NO
其中NO为学号(数值型),NAME为姓名,SEX为性别,AGE为年龄,CLASS为班号。写出实现下列功能的SQL语句。
删除学号为20的学生记录;______。
A.SELECTSN,AGE,SEXFROMSWHEREAGE>(SELECTAGEFROMS;WHERESN='王华')
B.SELECTSN,AGE,SEXFROMSWHERESN='王华'
C.SELECTSN,ACE,SEXFROMSWHEREAGE>(SELECTACEWHERESN='王华')
D.SELECTSN,ACE,SEXFROMSWHEREACE>王华AGE
A.conceit
B.conceiting
C.conceited
D.conceitedness