CREATE OR REPLACE TRIGGER tr_reg_cou2 -------------------------名字随便起不能重复
AFTER update OF HTG_CODE
ON CWH_HERITAGE
FOR EACH ROW
BEGIN
UPDATE cwh_sub_monitor_log SET SML_CODE = :new.HTG_CODE
WHERE SML_CODE = :old.HTG_CODE;
END;
语句释义:
首先声明,蓝色字体和红色字体为固定形式,红色字体为强调
这句话的意思是当更新CWH_HERITAGE中HTG_CODE字段时,cwh_sub_monitor_log中的SML_CODE也跟着相应的 改变