Solved

SQL Server Triggers

Posted on 2010-09-07
3
329 Views
Last Modified: 2012-08-14
Is there an example of a trigger in SQL Server that updates a different table. For example, I need to update the history table by inserting a new record when a field is updated in the parent table. Any suggestions or example?
0
Comment
Question by:dodgerfan
3 Comments
 
LVL 60

Accepted Solution

by:
chapmandew earned 250 total points
ID: 33620096
create trigger mytrigger
on mytablename
after update
as
begin
insert into anotherdb.dbo.tablename(fieldlist)
select fieldlist
from inserted
end
0
 
LVL 26

Assisted Solution

by:Shaun Kline
Shaun Kline earned 250 total points
ID: 33620179
Assuming you want to put the old values into history:
CREATE TRIGGER <trigger name> ON <your table>
INSTEAD OF UPDATE
AS 
BEGIN
    SET NOCOUNT ON;

    INSERT INTO <history table>
    SELECT <field values>
    FROM <your table>
        INNER JOIN Inserted ON <your table>.<key field> = Inserted.<key field>

    UPDATE <your table>
    SET <field list> = Inserted.<field list>
    FROM <your table>
        INNER JOIN Inserted ON <your table>.<key field>= Inserted.<key field>
END

Open in new window

0
 

Author Comment

by:dodgerfan
ID: 33620628
This is what I have so far, and I'm getting an error:

create trigger updatehistory
on booking
after update
as
begin
insert into bookinghistory(hotelno,guestno,datefrom,dateto,roomno)
select hotelno,guestno,datefrom,dateto,roomno
from inserted
end

The error says:The row value(s) updated or deleted do not make the row unique or they alter mulitple rows(2 rows).
0

Featured Post

Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This is basically a blog post I wrote recently. I've found that SARGability is poorly understood, and since many people don't read blogs, I figured I'd post it here as an article. SARGable is an adjective in SQL that means that an item can be fou…
Occasionally there is a need to clean table columns, especially if you have inherited legacy data. There are obviously many ways to accomplish that, including elaborate UPDATE queries with anywhere from one to numerous REPLACE functions (even within…
In a recent question (https://www.experts-exchange.com/questions/28997919/Pagination-in-Adobe-Acrobat.html) here at Experts Exchange, a member asked how to add page numbers to a PDF file using Adobe Acrobat XI Pro. This short video Micro Tutorial sh…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

810 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question