SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


constant variable


constant variable

Author
Message
sqlfriends
sqlfriends
SSCertifiable
SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)

Group: General Forum Members
Points: 5204 Visits: 4102
We have a default OrgnizationID we need to use in our database. It's a constant integer variable.
In quite a few stored procedures we use it.

But sometimes the default OrganizaitonID changes, instead of changing in all the stored procedure about the constant variable, is there another way to do this?

can we setup a globle variable in sql server?

Thanks
John Michael Robertson
John Michael Robertson
Old Hand
Old Hand (312 reputation)Old Hand (312 reputation)Old Hand (312 reputation)Old Hand (312 reputation)Old Hand (312 reputation)Old Hand (312 reputation)Old Hand (312 reputation)Old Hand (312 reputation)

Group: General Forum Members
Points: 312 Visits: 357
One possible method is to create a simple scalar function to return the value.
GilaMonster
GilaMonster
SSC Guru
SSC Guru (117K reputation)SSC Guru (117K reputation)SSC Guru (117K reputation)SSC Guru (117K reputation)SSC Guru (117K reputation)SSC Guru (117K reputation)SSC Guru (117K reputation)SSC Guru (117K reputation)

Group: General Forum Members
Points: 117181 Visits: 45532
Put it into a 'Consts' table

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass


sqlfriends
sqlfriends
SSCertifiable
SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)

Group: General Forum Members
Points: 5204 Visits: 4102
Yes, we ended up to create a simple scalar function to return the value.

And what is the const table?
GilaMonster
GilaMonster
SSC Guru
SSC Guru (117K reputation)SSC Guru (117K reputation)SSC Guru (117K reputation)SSC Guru (117K reputation)SSC Guru (117K reputation)SSC Guru (117K reputation)SSC Guru (117K reputation)SSC Guru (117K reputation)

Group: General Forum Members
Points: 117181 Visits: 45532
A table that you create to store constants.

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass


Steve Jones
Steve Jones
SSC Guru
SSC Guru (83K reputation)SSC Guru (83K reputation)SSC Guru (83K reputation)SSC Guru (83K reputation)SSC Guru (83K reputation)SSC Guru (83K reputation)SSC Guru (83K reputation)SSC Guru (83K reputation)

Group: Administrators
Points: 83463 Visits: 19223
I've done what I think Gail suggests and used a table as a global variable store, or a definition table. You store values in there that are needed in the application, and are likely "constant", but could potentially change (rarely). Almost like a configuration values table.

Follow me on Twitter: @way0utwest
Forum Etiquette: How to post data/code on a forum to get the best help
My Blog: www.voiceofthedba.com
sqlfriends
sqlfriends
SSCertifiable
SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)SSCertifiable (5.2K reputation)

Group: General Forum Members
Points: 5204 Visits: 4102
Thanks, so in this approach of storing constant in the table, how can we use it in sproc,
To select the value from the table? Or use a function?
GSquared
GSquared
SSC-Dedicated
SSC-Dedicated (30K reputation)SSC-Dedicated (30K reputation)SSC-Dedicated (30K reputation)SSC-Dedicated (30K reputation)SSC-Dedicated (30K reputation)SSC-Dedicated (30K reputation)SSC-Dedicated (30K reputation)SSC-Dedicated (30K reputation)

Group: General Forum Members
Points: 30843 Visits: 9730
Build a table with constants in it.

Move it to a read-only filegroup, so that it avoids locks/blocks/et al, in terms of contention.

Select from it when you need to use a value.

If you ever need to change it, change the file to read-write, update it, then change it back to read-only.

- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
Property of The Thread

"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
Steve Jones
Steve Jones
SSC Guru
SSC Guru (83K reputation)SSC Guru (83K reputation)SSC Guru (83K reputation)SSC Guru (83K reputation)SSC Guru (83K reputation)SSC Guru (83K reputation)SSC Guru (83K reputation)SSC Guru (83K reputation)

Group: Administrators
Points: 83463 Visits: 19223
Use Gus' advice. You could use a function, but a simple select works just as well. Depends on how you want to encapsulate this for developers.

Follow me on Twitter: @way0utwest
Forum Etiquette: How to post data/code on a forum to get the best help
My Blog: www.voiceofthedba.com
Sean Lange
Sean Lange
SSC-Dedicated
SSC-Dedicated (33K reputation)SSC-Dedicated (33K reputation)SSC-Dedicated (33K reputation)SSC-Dedicated (33K reputation)SSC-Dedicated (33K reputation)SSC-Dedicated (33K reputation)SSC-Dedicated (33K reputation)SSC-Dedicated (33K reputation)

Group: General Forum Members
Points: 33745 Visits: 17681
One big advantage of a const table (I have always called mine control) is that you can very easily get the values out of this table (assuming there are not very many columns and ONLY 1 row). just add a cross join to your table and you are all set.


declare @Code int = 10
select * from myTable
where myTable.Code = @Code

becomes

select * from MyTable
cross join control c
where MyTable.Code = c.Code




_______________________________________________________________

Need help? Help us help you.

Read the article at http://www.sqlservercentral.com/articles/Best+Practices/61537/ for best practices on asking questions.

Need to split a string? Try Jeff Modens splitter.

Cross Tabs and Pivots, Part 1 – Converting Rows to Columns
Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs
Understanding and Using APPLY (Part 1)
Understanding and Using APPLY (Part 2)
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search