May 8, 2025 · PL/pgSQL can be used to define trigger functions on data changes or database events. A trigger function is created with the CREATE FUNCTION command, declaring it as a …

Jul 14, 2024 · A PostgreSQL trigger is a powerful tool that allows automatic invocation of a function whenever a specified event occurs on a table. Events that can trigger a function …

Mar 30, 2024 · To create a new trigger in PostgreSQL, you follow these steps: First, create a trigger function using CREATE FUNCTION statement. Second, bind the trigger function to a …

Oct 16, 2024 · Creating or replacing a trigger in PostgreSQL involves 2 main steps: Step 1. Create Or Replace Trigger Function Syntax. The trigger function contains the logic that will …

Jul 16, 2015 · In the SQL standard, you define a trigger that fires a trigger function when a certain action is taking place. In your case you want to create an AFTER INSERT trigger whose …

In this guide, you'll learn how to create powerful trigger functions that can validate data, maintain audit trails, keep derived data in sync, and much more — all automatically whenever data …

In PostgreSQL, a trigger is a database object that automatically executes a specified function or procedure in response to certain events on a table or view. Triggers are useful for enforcing …

Nov 13, 2023 · Here is the syntax : Syntax: CREATE [ CONSTRAINT ] TRIGGER name { BEFORE | AFTER | INSTEAD OF } { event [ OR ... ] } ON table_name. [ FROM …

Jan 24, 2023 · In PostgreSQL, if you want to take action on specific database events, such as INSERT, UPDATE, DELETE, or TRUNCATE, then trigger functionality can be useful as it will …

May 8, 2025 · The ability to specify multiple actions for a single trigger using OR is a PostgreSQL extension of the SQL standard. The ability to fire triggers for TRUNCATE is a PostgreSQL …