Oracle 触发器 before insert update 场景,往A表插入数据时,A表和B表是同一类型的状态下,A表中累计的值,不能超过B表中的值(注:往数据库插入时,不能批量执行事务!),利用触发器before insert update,监控状态,若超过B表中的值,抛异常 CREATEORREPLACETRIGGER"RATED_TIME_BUDGET_ITEM_TRG" beforeinsertorupdateo...
-- statement级before trigger CREATEORREPLACETRIGGERsecure_emp BEFOREINSERTORDELETEORUPDATEONemployees BEGIN IF (TO_CHAR(SYSDATE,'DY')IN('SAT','SUN'))OR (TO_CHAR(SYSDATE,'HH24:MI')NOTBETWEEN'08:00'AND'18:00')THEN RAISE_APPLICATION_ERROR(-20500, 'You may modify EMPLOYEES table only on we...
-- row级before trigger,注意when的用法 CREATEORREPLACETRIGGERderive_commission_pct BEFOREINSERTORUPDATEOFsalaryONemployees FOREACH ROW WHEN(NEW.job_id ='SA_REP') BEGIN IF INSERTINGTHEN :NEW.commission_pct := 0; ELSIF :OLD.commission_pctISNULLTHEN :NEW.commission_pct := 0; ELSE :NEW.commissio...
create [or replace] trigger 触发器名 触发时间 {before | after} -- view 中是 instead of 触发事件 { insert | update | delete} -- dml、ddl、database on 触发对象 -- table、view、schema、database 触发频率 { for each row} -- 行级触发器。默认:语句级触发器 [follows 其它触发器名] -- ...
以下是Oracle Trigger的正确使用方法: 创建Trigger:使用CREATE TRIGGER语句来创建Trigger对象。语法如下: CREATE [OR REPLACE] TRIGGER trigger_name [BEFORE | AFTER] {[INSERT] [OR] [UPDATE] [OR] [DELETE]} ON table_name [FOR EACH ROW] [WHEN (condition)] [DECLARE] [local_variable_declarations] ...
UPDATE触发器:在更新表中现有记录时触发。它可以用于在更新数据之前或之后执行某些操作,如验证更新后的数据是否有效、记录数据的变化历史等。 4. 提供INSERT触发器和UPDATE触发器的基本语法结构 INSERT触发器基本语法结构 sql CREATE OR REPLACE TRIGGER trigger_name BEFORE/AFTER INSERT ON table_name FOR EACH ROW ...
update: create or replace trigger TRI_MOD_EMP after update on emp for each row declare pragma autonomous_transaction; begin insert into emp_copy select t.*, sysdate, 'update', 'SAL : 改变前 ' || :old.SAL || ' ==> 改变后' || :new.SAL ...
EXAMPLE1 (column1 integer, column2 integer, column3 integer); 插入: INSERT INTO EXAMPLE1 VALUES (1,11,111);触发器: create or replace TRIGGER trigger_nameFOR EACH ROW BEGINRAISE_APPLICATION_ERROR(-20000, 'You can't directlyup 浏览42提问于2021-01-19得票数1 ...
4.多事件Trigger,在Trigger Body中判断具体事件 CREATE OR REPLACE TRIGGER secure_emp BEFORE INSERT OR UPDATE OR DELETE ON employees BEGIN IF (TO_CHAR (SYSDATE,'DY') IN ('SAT','SUN')) OR (TO_CHAR (SYSDATE, 'HH24') NOT BETWEEN '08' AND '18') ...
这么写就行了：create or replace trigger updatedb_TEST_STURECORD before insert or update on TEST_STURECORD for each row begin if inserting then update TEST_STURECORD@DBLINKTEST set STUR_ID =:New.STUR_ID, stur_where=:New.stur_where;end if;if updating then insert TEST_STURECORD...