创建标的约束时使用的fk_typeid_new是什么意思??
create table userinfo_f2 2 (id varchar2(10) primary key, 3 username varchar2(20), 4 typeid_new varchar2(10), 5 constraint fk_typeid_new foreign key (typeid_new) references typeinfo(typeid)); fk_typeid_new在哪里??
create table userinfo_f2 2 (id varchar2(10) primary key, 3 username varchar2(20), 4 typeid_new varchar2(10), 5 constraint fk_typeid_new foreign key (typeid_new) references typeinfo(typeid)); fk_typeid_new在哪里??
2016-12-20
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