This article shows you how to useAFTER UPDATE TRIGGER, it will fire after the update operation is executed. 1. Logging example In this example, after each update on ‘SALARY’ column ofemployee_salary, it will fire a ‘after update’ trigger and insert the new updated data into aemployee_...
create or replace TRIGGER trigger_name BEFORE UPDATE OF COLUMN1 ON EXAMPLE1 FOR EACH ROW BEGIN RAISE_APPLICATION_ERROR(-20000, 'You can't directly update this column.'); END; Update: UPDATE EXAMPLE1 SET COLUMN1=2 WHERE COLUMN2=11; 因此,当我尝试更新column1(column1=2)时,应该执行触发器并...
ALTERTRIGGERtrigger_name DISABLE;-- 失效,生效改为enable ALTERTABLEtable_name DISABLEALLTRIGGERS;-- 批量失效,批量生效改为enable ALTERTRIGGERtrigger_name COMPILE;-- 重新编译trigger DROPTRIGGERtrigger_name;-- 删除trigger oracle数据库中trigger的使用,大概就是这样,虽然看着比较多,但是在实际中确是不太建议使...
■ Do not create triggers that depend on the order in which a SQL statement processes rows (which can vary). For example, do not assign a value to a global package variable in a row trigger if the current value of the variable depends on the row being processed by the row trigger. I...
CREATE TRIGGER trigger_name [BEFORE|AFTER|INSTEAD OF] event_name ON table_name [ -- 触发器逻辑... ]; 1. 2. 3. 4. 5. 触发器的一个例子: -- 实际的触发器 CREATE OR REPLACE TRIGGER TEST_TRI AFTER DELETE OR INSERT OR UPDATE ON TESTTABLE DECLARE...
在Oracle数据库中,触发器是一种特殊的数据库对象,它与表相关联,当表发生特定事件(如INSERT、UPDATE、DELETE)时,触发器会自动执行相应的代码逻辑。在这个问题中,涉及到触发器的Before update类型。 概念: Before update触发器是一种在执行UPDATE操作之前触发的触发器,它允许我们在更新数据之前执行一些额外的逻辑。它通...
TRIGGER -o triggers.sql -b %namespace%/schema/triggers -c %namespace%/config/ora2pg.conf ora2pg -p -t TYPE -o types.sql -b %namespace%/schema/types -c %namespace%/config/ora2pg.conf ora2pg -p -t VIEW -o views.sql -b %namespace%/schema/views -c %namespace%/config/ora...
1.2 Then we will create a before update tigger on columnJOB_EXPERIENCEandLAST_APPLIED_DATEof job_openings table. trg_before_emp_update -- Creating TRIGGERCREATEORREPLACETRIGGERtrg_before_emp_update BEFOREUPDATEOFJOB_EXPERIENCE,LAST_APPLIED_DATEonjob_openingsFOREACHROWDECLAREyears_since_last_applied nu...
The advanced alert enables you to create a condition that can trigger the alert. In this release, you can incorporate more SQL functionality in the advanced alert condition that provides the ability to compare a list of valid values to incoming audit data content. For example, you can compare...
If there are changes made to the source databases or objects, clickin the upper right corner to update the objects to be synchronized. If an object name contains spaces, the spaces before and after the object name are not displayed. If there are two or more consecutive spaces in the middle...