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SQLize.online is a free online SQL environment for quickly running, experimenting with and sharing code.
You can run your SQL code on top of the most popular RDBMS including MySQL, MariaDB, SQLite, PostgreSQL, Oracle and Microsoft SQL Server.
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CREATE OR REPLACE TRIGGER display_salary_changes BEFORE DELETE OR INSERT OR UPDATE ON customers FOR EACH ROW WHEN (NEW.ID > 0) -- Assuming ID is the primary key DECLARE sal_diff NUMBER; BEGIN IF UPDATING THEN -- Calculate salary difference for UPDATE operation sal_diff := :NEW.SALARY - :OLD.SALARY; ELSIF INSERTING THEN -- Calculate salary difference for INSERT operation sal_diff := :NEW.SALARY; ELSIF DELETING THEN -- Calculate salary difference for DELETE operation sal_diff := :OLD.SALARY; END IF; -- Display the salary difference (you can customize this part) DBMS_OUTPUT.PUT_LINE('Salary Difference: ' || sal_diff); END; /
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