SQL建表语句，有主外键

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create table t_tablename
(
id int idname primary key identity(1,1),
name varchar(20) not null
studentId int foreign key (**id)

或备好森者：仿亩袜神atler table score
add constraint FK_Sno foreign key(S_no) references student(S_no)
add constraint FK_Cno foreign key(C_no) references course(C_no)
)

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