PostgreSQL How to create AFTER OR BEFORE INSERT in one trigger
As some have stated in comments answering your ion if you want a trigger to execute BEFORE and AFTER you have to declare two triggers that execute the same function Use of OR The keyword OR is used to specify multiple events as per the docs One of INSERT UPDATE DELETE or TRUNCATE this specifies the event that will fire the trigger
Trigger What is the difference between an after update and a before , But anything you want to do you can do like check data in a separate table and issue an update insert whatever in that table etc If for some reason the trigger causes an EXCEPTION then execution ceases and the DML statement is never executed In an AFTER trigger the trigger is executed AFTER the DML statement is executed
PostgreSQL Documentation 16 43 10 Trigger Functions
Example 43 4 A PL pgSQL Trigger Function for Auditing This example trigger ensures that any insert update or delete of a row in the emp table is recorded i e audited in the emp audit table The current time and user name are stamped into the row together with the type of operation performed on it
39 1 Overview of Trigger Behavior PostgreSQL, On tables and foreign tables triggers can be defined to execute either before or after any INSERT UPDATE or DELETE operation either once per modified row The same trigger function can be used for multiple triggers PostgreSQL offers both per row triggers and per statement triggers With a per row trigger the trigger function is
PostgreSQL CREATE TRIGGER Statement By Practical Examples
PostgreSQL CREATE TRIGGER Statement By Practical Examples, To create a new trigger in PostgreSQL you follow these steps First create a trigger function using CREATE FUNCTION statement The event can be INSERT DELETE UPDATE or TRUNCATE Fourth specify the name of the table associated with the trigger after the ON keyword Fifth specify the type of triggers which can be
SQL DELETE Trigger Syntax And Examples Of SQL DELETE Trigger
PostgreSQL TRIGGER Modify data at INSERT UPDATE and DELETE
PostgreSQL TRIGGER Modify data at INSERT UPDATE and DELETE Triggers in PostgreSQL are database callback functions that are automatically performed or triggered when certain events occur on a table or view Common use cases for triggers include enforcing business rules auditing and maintaining complex data integrity To create a trigger first you need to define a trigger function using the CREATE
What Is Apex Triggers In Salesforce SfdcGenius
Overview of Trigger Behavior A trigger can be defined to execute before or after an INSERT UPDATE or DELETE operation either once per modified row or once per SQL statement If a trigger event occurs the trigger s function is called at the appropriate time to handle the event The trigger function must be defined before the trigger itself PostgreSQL Documentation 8 0 Triggers. Description CREATE TRIGGER creates a new trigger The trigger will be associated with the specified table view or foreign table and will execute the specified function function name when certain operations are performed on that table The trigger can be specified to fire before the operation is attempted on a row before constraints are checked and the INSERT UPDATE or DELETE is 1 To fire your trigger for all data change events code the event as INSERT OR UPDATE OR DELETE CREATE TRIGGER tr new rentals AFTER INSERT OR UPDATE OR DELETE ON public rental FOR EACH ROW EXECUTE FUNCTION public fn rental trigger Since the top 10 data depends only on data in tables and not the event insert update or delete that caused
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