Oracle觸發器的使用

將觸發器應用在插入表時相應欄位唯一值

 

--建遞增序列
CREATE SEQUENCE LZEAM_SP_LOOP_EQ_SEQ MINVALUE 1 INCREMENT BY 1 START WITH 1

測試:
SELECT LZEAM_SP_LOOP_EQ_SEQ.NEXTVAL FROM DUAL

--建觸發器
CREATE OR REPLACE TRIGGER LZEAM.LZEAM_SP_LOOP_EQ_TRIGGER BEFORE INSERT ON SP_LOOP_EQ FOR EACH ROW BEGIN SELECT LZEAM.LZEAM_SP_LOOP_EQ_SEQ.NEXTVAL INTO :NEW.LOOP_EQ_CODE FROM DUAL; END;

--查觸發器
SELECT * FROM USER_TRIGGERS;

/**啟/禁用觸發器*/
ALTER TABLE SP_LOOP_EQ DISABLE ALL TRIGGERS ALTER TABLE SP_LOOP_EQ ENABLE ALL TRIGGERS