Mutating table on Oracle SQL trigger

Question

I\'m trying to do a trigger but I get a mutating table error. The SQL code is something like this:

CREATE OR REPLACE TRIGGER CHK_Apartado_D
BEFORE INSERT OR UPDA         


        

Answer 1

A common solution is Using Compound Triggers to Avoid Mutating-Table Error.

Better still, don't attempt to use triggers to implement complex business logic. Instead, build an API package with a procedure insert_contract that implements the business rules, and ensure (via privileges) that users call that API rather than inserting directly into the table. Triggers can get very messy, very quickly.