Simple problem with triggers

Question

Hi all,
Initially I have written a trigger for testing .But im not able to write it as per the requirement.Actually I have written the trigger for a table "test" when a row is inserted into it then my trigger will insert a row in another table.In the same way if an row is UPDATED then that same field of the same row is to be updated in another table.how can I do this by modifying this trigger code.Im in a confusion of doing this.
Table: test.
Name Null? Type
ID NOT NULL NUMBER(38)
UNAME VARCHAR2(15)
PWD VARCHAR2(10)
Table : test123.
Name Null? Type
ID NUMBER
UNAME VARCHAR2(30)
PWD VARCHAR2(30)
the trigger is as follows:
CREATE OR REPLACE TRIGGER inst_trigger
AFTER INSERT OR UPDATE
ON test
FOR EACH ROW
DECLARE
     id number;
     uname varchar2(20);
     pwd varchar2(20);
BEGIN
     id := 1245;
     uname :='abc';
     pwd := 'xyz';
     IF INSERTING THEN
INSERT INTO test123 VALUES (id,uname,pwd);
     END IF;
END test_trigger;
how can i modify this for the above mentioned use.
Thanks in advance,
Trinath Somanchi,
Hyderabad.

Answer 1

Hallo,
naturally , you have not assign values directly in trigger. They come automatically
in trigger with :new - variables.
CREATE OR REPLACE TRIGGER scott.inst_trigger
AFTER INSERT OR UPDATE
ON scott.test
FOR EACH ROW
BEGIN
IF INSERTING THEN
INSERT INTO scott.test123 VALUES (:new.id,:new.uname,:new.pwd);
ELSE
UPDATE scott.test123
set uname = :new.uname, pwd = :new.pwd
where id = :new.id;
END IF;
END inst_trigger;Nicolas, yes, merge here is very effective, but i think, that OP can starts with simpler version von "upsert".
Regards
Dmytro