Trigger i Oracle

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Trigger i Oracle

Minnu

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Points: 6451
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March 26, 2013 at 5:49 am

#272148

Hi Team,
Am new to Oracle, i need a trigger
i have a table named Stud:
Columns : ID, Stud_Name,
Another table named : Lab
Columns : ID, Stud_ Name
i want to trigger, when ever any insert or update or delete on Stud, it need to check the Id, Stud_Name in Lab table, if available, then get
the ID and udpate status ='Y' where TABLE = "APP"
Table : APP
Columns : ID, Status
Please help me....

Viewing 4 posts - 1 through 3 (of 3 total)

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Lowell SSC Guru Points: 323504 More actions · Answer 1

Minnu this looks a lot like homework, and we hate to do folks work on their behalf, because they don't learn the concepts they need later;

Oracle triggers are different than SQL triggers, as they are performed per row; a lot of us work in both environments, so you should still be able to get help here, even though it's a SQL Server Centric Forum.

If you can show us what you have so far, we can help push you in the right direction.

Lowell

--help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!

Minnu SSCertifiable Points: 6451 More actions · Answer 2

i've done below.....

CREATE TRIGGER TRG_TMP

AFTER INSERT OR UPDATE OR DELETE

OF ID or Stud_Name

ON

STUD

BEGIN

--

here i need oracle query to compare the ID, stud_name in two tables,

and i want to update APP table.

END

Please help me...

Lowell SSC Guru Points: 323504 More actions · Answer 3

take a look at the syntax for an oracle trigger here:

there's an example there, and you can see how fields are referenced with the :columnname indicator

see if that helps you build a better trigger;

http://www.techonthenet.com/oracle/triggers/after_update.php

Lowell

--help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!