The source for a MERGE statement can be a table, view, or the result of a subquery.ON Clause - The ON clause specifies the condition that the MERGE operation uses to determine whether it updates or inserts.When the subquery fails to find a matching row in tbl B, the subquery returns NULL.
- who is jamie feick dating
- Cams sexo online gratis
- Porno webcams hermitage pa
- Erotic asian free text sex chat
- How to sign up for free sex for teens
- rachel mcadams and luke wilson dating
- dating websites for overweight people
As we’ve already created both the tables in above example, we will directly write a trigger for ‘AFTER UPDATE’.
CREATE or REPLACE TRIGGER emp_after_update AFTER UPDATE OF empid ON emp FOR EACH ROW DECLARE BEGIN update emp_backup set empid = :new.empid where empid = :old.empid; DBMS_OUTPUT.
INTO Clause - The INTO clause is used to specify the target table into which you are inserting or updating.
USING Clause - The USING clause specifies the source of the data to be updated or inserted.
The decision to perform an insert or update is based on conditions specified by you.