在約束的末尾加上 on delete cascade
alter table V_PAPER
drop constraint FK_KS_PRO_P_REFERENCE;
alter table V_PAPER
add constraint FK_KS_PRO_P_REFERENCE foreign key (KS_POLICY_TID)
references V_POLICY (TID)
on delete cascade;
如果主表V_PAPER刪除一條記錄,那麼V_ROLICY中對應的關聯的數據也跟着刪除。