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帮忙看一下哪里出错了,谢谢!
SQL> create table stu(stuid number(5) constraint pk_stu primary key,stuname varchar2(10) not null,mail varchar2(20) constraint uk_stu unique);
SQL> create table cla(claid number(3) constraint pk_cla primary key,stuid number(5) constraint fk_stu foreign key (stuid) references stu(stuid),claname varchar2(10));
create table cla(claid number(3) constraint pk_cla primary key,stuid number(5) constraint fk_stu foreign key (stuid) references stu(stuid),claname varchar2(10));
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第 1 行出现错误:
ORA-02253: constraint specification not allowed here |
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