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在SQL语句中Primary Key用来表示外键。()
在SQL语句中Primary Key用来表示外键。()
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在SQL语句中Primary Key用来表示外键。()
如果学生表Student是使用下面的SQL语句创建的:
CREATE TABLE Student(SNO C(4) PRIMARY KEY NOT NULL,;
SN C(8),;
SEX C(2),;
AGE N(2) CHECK(AGE>15 AND AGE<30))
下面的SQL语句中可以正确执行的是( )。
A.INSERT INTO STUDENT(SNO,SEX,AGE)VALUES("S9","男",17)
B.INSERT INTO STUDENT(SN,SEX,AGE)VALUES("李安琦","男",20)
C.INSERT INTO STUDENT(SEX,AGE)VALUES("男",20)
D.INSERT INTO STUDENT(SNO,SN)VALUES("S9","安琦",16)
A.PRIMARY KEY
B.NOT NULL
C.FOREIGN KEY……REFERENCES
D.FOREIGN KEY
A.X10ANDX15
B.XBetween10And15
C.XIN(11,12,13,14)
D.XBetween11AND14
T.对
F.错