Solved

SQL Server Identity Column Leading Zeros

Posted on 2010-08-27
7
366 Views
Last Modified: 2012-05-10
Can I have my (int) identity column 6 numeric characters?

like this:
000001
000002
000003
000010
000011
000100
0
Comment
Question by:webdork
7 Comments
 
LVL 143

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 250 total points
ID: 33546768
a identity field is numerical data type (int ... )numerical data types don't allow leading "0" ...so, you need 2 columns ... 1 being int/identity, and the second one being a computed column, using the other column, and formatting it as you need it:
alter table yourtable add formatted_key = right( '000000' + cast(your_identity_key as varchar(10)), 6)

Open in new window

0
 

Author Comment

by:webdork
ID: 33546812
I see... kinda.

I'm guessing if i run the statement above (with correct table and column names) it will create a new column called formatted_key and populate with correct values at this point in tome. How do i keep the new column updated as new records are added?
0
 
LVL 30

Expert Comment

by:MlandaT
ID: 33546818
...or just format the data in your application when you display the value.
0
What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

 
LVL 51

Assisted Solution

by:Huseyin KAHRAMAN
Huseyin KAHRAMAN earned 250 total points
ID: 33546823
leave it as identity (int) and use sql to get it formatted

select id, right('000000'+cast(id as varchar),6) as fid from myTable
0
 
LVL 58

Expert Comment

by:cyberkiwi
ID: 33546904
> it will create a new column called formatted_key
yes

> and populate with correct values at this point in tome.
no- a COMPUTED column is a "virtual" column that is only calculated when used. nothing is stored *

> How do i keep the new column updated as new records are added?
a COMPUTED column is "virtual", and only calculated when used, so whenever you use

select identity_key, formatted_key ....

formatted_key will automatically expand to "right( '000000' + cast(your_identity_key as varchar(10)), 6)" and give you the result desired.

* You can make a computed column stored by creating an index on it.
0
 

Author Comment

by:webdork
ID: 33546997
cyberkiwi:

Thank you so much for your detailed valuable response. I'd assigned points before I saw your input.

D
0
 
LVL 58

Expert Comment

by:cyberkiwi
ID: 33547597
webdork,

It is no problem.  Just wanted to make sure you understood.

Cheers
0

Featured Post

Free learning courses: Active Directory Deep Dive

Get a firm grasp on your IT environment when you learn Active Directory best practices with Veeam! Watch all, or choose any amount, of this three-part webinar series to improve your skills. From the basics to virtualization and backup, we got you covered.

Question has a verified solution.

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

Suggested Solutions

Having an SQL database can be a big investment for a small company. Hardware, setup and of course, the price of software all add up to a big bill that some companies may not be able to absorb.  Luckily, there is a free version SQL Express, but does …
I have a large data set and a SSIS package. How can I load this file in multi threading?
Using examples as well as descriptions, and references to Books Online, show the different Recovery Models available in SQL Server and explain, as well as show how full, differential and transaction log backups are performed
This videos aims to give the viewer a basic demonstration of how a user can query current session information by using the SYS_CONTEXT function

685 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