Trigger

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Trigger

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chandrasekaran.ganapathy

Posted Tuesday, March 23, 2010 4:05 AM

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Hi, I have created the Trigger for insertion, Deletion, and Updation.

But the thing is, Suppose If I have multiple insertion, trigger fires that much times.

Do there any to restrict this, we can't do any thing.

Ex:

Insert into table values(' ')
Insert into table values(' ')
Insert into table values(' ')

If I insert three values, trigger fires three time. I agree that this is the nature. But any way to control, if i give multiple insert, it should do at the end.... Probably this might be a stupid question. But please answer this?

Post #887941

mister.magoo

Posted Tuesday, March 23, 2010 4:10 AM

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It is not clear what you want to do if there are multiple rows being updated.

If you want the trigger not to fire for multiple row updates then you can do this

create trigger.....
AS
IF (SELECT COUNT(*) FROM inserted)>1 RETURN
IF (SELECT COUNT(*) FROM deleted)>1 RETURN

If you want to handle multiple updates/inserts then you need to make sure everything in the trigger is set based.

e.g.

create trigger....
as
insert mytable(<column-list>) select <column-list> from inserted where <selections>

Post #887943

chandrasekaran.ganapathy

Posted Tuesday, March 23, 2010 4:18 AM

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Now I'll tell you clearly...

I am having employee table.

Suppose If today 10 new joinees Joined. So I'll add through Insert statement.

SO I will give 10 insert statement. right?

But here I have a trigger for Insert, Update,Delete.

My requirement is at the insertion end, trigger should work.

But here 10 times trigger is triggered. Since i am using 10 insert.

So Is there anything to control, if i use multiple insert trigger should work at the end of the last insert.

Post #887950

chandrasekaran.ganapathy

Posted Tuesday, March 23, 2010 4:18 AM

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Post #887951

vidya_pande

Posted Tuesday, March 23, 2010 4:33 AM

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in SQL Server its statement level trigger. For each statement trigger is fired. There is not any solution for the scenario you are thinking of

Post #887961

chandrasekaran.ganapathy

Posted Tuesday, March 23, 2010 4:41 AM

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Do I need to change the trigger function also, I can. This is my req.

Please help on this....

Post #887966

Kingston Dhasian

Posted Tuesday, March 23, 2010 4:47 AM

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Why such a strange requirement? What is the problem if the trigger gets called 10 times? But still if you want the trigger to be called only once try converting your 10 statements into one.

One way to do this would be to insert all the records in a temporary table without the trigger and then insert in the permanent table with the trigger at one go with an INSERT...SELECT method.

But i wonder what benefit you will derive out of this? Unsure

Kingston Dhasian

How to post data/code on a forum to get the best help - Jeff Moden
http://www.sqlservercentral.com/articles/Best+Practices/61537/

Post #887968

vidya_pande

Posted Tuesday, March 23, 2010 4:52 AM

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I wanted to say that you can not have trigger called only once for many insert statements.

I think u could have done this for the below statement-

insert into Table1 (col1, col2) Select col1,col2 from Table2

Here trigger is fired only once.

Post #887970