Solved

Update Column Using INSERT trigger

Posted on 2014-03-10
3
441 Views
Last Modified: 2014-03-10
Hi All,

I really struggle when it comes to writing triggers so I figured I would ask the experts.

I have a table called "group_members" which has the following schema:

group_member_id PK int
group_id int FK to table "groups"
contact_id int FK to table "contacts"

Whenever a record is inserted into this table I want to do the following

Query the groups table for the ID of the group inserted above and retrieve the value groups.pricing_level

Then, update the field, contacts.pricing_level in the contacts table.

In other words, we add a member to a group, retrieve the pricing level for the group and update to contact to have the same level.

Any help appreciated.  Trigger contexts always baffles me.
0
Comment
Question by:ccleebelt
3 Comments
 
LVL 6

Expert Comment

by:c1nmo
ID: 39919143
Would that not create redundancy, what if the groups.pricing_level value changed in the future?  Maybe better to retrieve the value dynamically when needed?
0
 
LVL 69

Accepted Solution

by:
ScottPletcher earned 500 total points
ID: 39919205
CREATE TRIGGER group_members__TRG_INSERT
ON dbo.group_members
AFTER INSERT
AS
SET NOCOUNT ON
UPDATE c
SET c.pricing_level = g.pricing_level
FROM inserted i
INNER JOIN dbo.groups g ON
    g.group_id = i.group_id
INNER JOIN dbo.contacts c ON
    c.contact_id = i.contact_id
GO
0
 

Author Closing Comment

by:ccleebelt
ID: 39919405
Once again, you are the man.  Thank you.
0

Featured Post

Comprehensive Backup Solutions for Microsoft

Acronis protects the complete Microsoft technology stack: Windows Server, Windows PC, laptop and Surface data; Microsoft business applications; Microsoft Hyper-V; Azure VMs; Microsoft Windows Server 2016; Microsoft Exchange 2016 and SQL Server 2016.

Question has a verified solution.

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

This article explains how to reset the password of the sa account on a Microsoft SQL Server.  The steps in this article work in SQL 2005, 2008, 2008 R2, 2012, 2014 and 2016.
Ever wondered why sometimes your SQL Server is slow or unresponsive with connections spiking up but by the time you go in, all is well? The following article will show you how to install and configure a SQL job that will send you email alerts includ…
Familiarize people with the process of retrieving data from SQL Server using an Access pass-thru query. Microsoft Access is a very powerful client/server development tool. One of the ways that you can retrieve data from a SQL Server is by using a pa…
Via a live example, show how to shrink a transaction log file down to a reasonable size.

920 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

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now