oracle 创建、删除唯一性约束

oracle 创建、删除唯一性约束 

alter table COUNTER_DATA drop constraint TERM_NO_REP_DATE;  
02.commit;  
03.  
04.alter table COUNTER_DATA add constraint TERM_NO_REP_DATE unique(C_BRANCH_OR_TERM_NO, D_CASH_REP_DATE);   
05.commit;