Trigger updating column oracle


08-Jan-2020 03:46

trigger updating column oracle-55

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PUT_LINE('Update on employees'); INSERT into Audi Tbl VALUES (seq_audit.nextval, user, 'UPDATE', sysdate, 'employees', :old.department_id, :new.department_id); END; / Trigger created.Summary: in this tutorial, you will learn about another named PL/SQL block called an Oracle trigger.You cannot replace trigger name which is associated with another table.CREATE [ OR REPLACE ] TRIGGER trigger_name AFTER INSERT or UPDATE or DELETE ON table_name [ FOR EACH ROW ] DECLARE -- variable declarations BEGIN -- trigger code EXCEPTION WHEN ...Only in Update triggers you can use “:new” and “:old” in same context. :old and :new reference " data-medium-file="https://sqlandplsql.files.wordpress.com/2013/04/trigger_old_new.jpeg? w=169" data-large-file="https://sqlandplsql.files.wordpress.com/2013/04/trigger_old_new.jpeg? w=220" class="size-full wp-image-1319 " title="old and new reference " alt="old and new reference " src="https://sqlandplsql.files.wordpress.com/2013/04/trigger_old_new.jpeg?w=656" srcset="https://sqlandplsql.files.wordpress.com/2013/04/trigger_old_220w, https://sqlandplsql.files.wordpress.com/2013/04/trigger_old_new.jpeg? w=85 85w" sizes="(max-width: 220px) 100vw, 220px" / CREATE TRIGGER [SCHEMA]. TABLE_NAME FOR EACH ROW DECLARE BEGIN “:new”.colum_name1 := ‘some_value’; “:new”.column_name2 := ‘some_value’; EXCEPTION WHEN OTHERS THEN RAISE; END TRIGGER_NAME; Here [SCHEMA] is optional.CREATE [OR REPLACE] TRIGGER trigger_name ON table_name [FOR EACH ROW] [WHEN (logical_expression)] [DECLARE] [PRAGMA AUTONOMOUS_TRANSACTION;] declaration_statements; BEGIN execution_statements; END [trigger_name]; / CREATE or REPLACE TRIGGER audit_emp_hours BEFORE INSERT OR UPDATE OR DELETE ON employees BEGIN IF TO_CHAR (SYSDATE, 'HH24: MI') NOT BETWEEN '' AND '' OR TO_CHAR (SYSDATE, 'DY') IN ('SAT', 'SUN') THEN RAISE_APPLICATION_ERROR (-20205, 'You may only make changes during normal office hours'); END IF; END; / Trigger Created.

Note that if a trigger is disabled, it is not fired when the triggering event occurs.PUT_LINE('Updating salary'); INSERT into Audi Tbl VALUES (seq_audit.nextval, user, 'UPDATE salary', sysdate, 'employees', : OLD.salary, : NEW.salary); WHEN UPDATING('department_id') THEN DBMS_OUTPUT.



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