Detect invalid FK-data after using "WITH NOCHECK"

By Johan Bijnens, 2007/05/15

Total article views: 135 | Views in the last 30 days: 6

Rate this |

Join the discussion |

Briefcase

In situations where FK's have been created using the "WITH NOCHECK" option you can get into troubles because the FK-data is not checked ! (so there may be invalid data in the FK-column !)

E.g. ALTER TABLE [dbo].[mytable] WITH NOCHECK add constraint [FK__USED_RESO__Actio__1162CF5F] FOREIGN KEY ( Action_Type ) REFERENCES [dbo].[Action_Types] ( Action_Type )

BOL states "... If you do not want to verify new CHECK or FOREIGN KEY constraints against existing data,
use WITH NOCHECK.
We do not recommend doing this, except in rare cases. ..."

I've commented the proc because I found the DBCC command that does even more than that !

By Johan Bijnens, 2007/05/15

Total article views: 135 | Views in the last 30 days: 6

Your response

Rate this |

Join the discussion |

Briefcase

Related tags

Dropping all Triggers

By Paul Ibison | Category: Miscellaneous

| 1,241 reads

SP that shows information from a given database

By Rodrigo Acosta | Category: Miscellaneous

| 1,526 reads

Analyze Space Used for each Table

By Jags2001 | Category: Miscellaneous

| 1,226 reads

Find a string in DB objects.

By James Travis | Category: Miscellaneous

| 1,019 reads

Like this? Try these...

Usp_GetProcByText

By Additional Articles | Category: Miscellaneous

| 397 reads

Optimized HexToSMALLINT

By Hans Lindgren | Category: T-SQL Aids

| 79 reads

Remove Exec Permissions To Extended Stored Procs

By Stevo Smocilac | Category: Maintenance and Management

| 66 reads

Already registered?

Free registration required

To read the rest of this article, and access thousands of other articles, we ask you to register on the site and subscribe to our newsletters.

Register

E-mail address:
Password:
Password (confirm):

Subscriptions

We ask you to register on the site and subscribe to our newsletters. Subscribing to our newsletters gets you:

ALL of our content (thousands of articles, scripts, and forum postings)
A daily newsletter (example)
A weekly news round up (example)
The opportunity to ask and answer questions in our forums
A daily Question of the Day to test and help you increase your knowledge of SQL Server.

We ask that you give the newsletter a try for a week. Over 200,000 SQL Server Professionals a day find it entertaining and useful. If not, you are welcome to unsubscribe at anytime.

Steve Jones
Editor, SQLServerCentral.com