我试图了解下面 SQL 中最好描述的情况是 WTF 还是某种黑客行为:
alter table CORE_FIELD
add constraint R_106 foreign key (CO_FIELD_ID)
references CORE_FIELD (CO_FIELD_ID) on delete set null;
数据库:Oracle 11.2.0.1
我试图了解下面 SQL 中最好描述的情况是 WTF 还是某种黑客行为:
alter table CORE_FIELD
add constraint R_106 foreign key (CO_FIELD_ID)
references CORE_FIELD (CO_FIELD_ID) on delete set null;
数据库:Oracle 11.2.0.1