Solved

Create Unique Reference on SQL Column

Posted on 2013-06-25
3
205 Views
Last Modified: 2013-06-25
Hi Guys

I have a Table called Person.

In Person I have  a column called UniqueRef.

The UniqueRef will start with LA00000001.

I need to create a sequential number.

So the next ref will be LA00000002 etc.

Thanks.
0
Comment
Question by:Shezad Ahmed
3 Comments
 
LVL 75

Expert Comment

by:Aneesh Retnakaran
ID: 39275015
Why dont you create an identity column and display the column like this 'LA00000001'
0
 
LVL 20

Accepted Solution

by:
dsacker earned 500 total points
ID: 39275043
Is this SQL Server? If so, here is a little test table that may demonstrate a solution:

DECLARE @TempList TABLE (
    Seq         int         NOT NULL IDENTITY (1, 1),
    UniqueRef   AS
        CONVERT(varchar(10), 'LA' +
        RIGHT('00000000' + CONVERT(varchar(8), Seq), 8)),
    Nbr varchar(3) NOT NULL )

DECLARE @Nbr        varchar(3)
SET @Nbr     = '115'

WHILE @Nbr < '178'
BEGIN
    INSERT INTO @TempList (Nbr) VALUES (@Nbr)
    SET @Nbr = CONVERT(varchar(3), CONVERT(smallint, @Nbr) + 1)
END

SELECT * FROM @TempList

Open in new window

0
 
LVL 34

Expert Comment

by:Brian Crowe
ID: 39275108
Is this column the primary key? if so then go with anees's suggestion above and make it an identity column and just format the value as needed with something like:

   'LA' + RIGHT('00000000' + UniqueRef, 8)

If this is not the case then I would just include the logic for determine the value of UniqueRef in the procedure that should be handling your insertions in that table.
0

Featured Post

U.S. Department of Agriculture and Acronis Access

With the new era of mobile computing, smartphones and tablets, wireless communications and cloud services, the USDA sought to take advantage of a mobilized workforce and the blurring lines between personal and corporate computing resources.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
SQL: launch actions one before the other 10 22
cannot connect to sqlserver 8 25
Refresh Dev server with Production database 8 27
SQL Improvement  ( Speed) 14 26
Load balancing is the method of dividing the total amount of work performed by one computer between two or more computers. Its aim is to get more work done in the same amount of time, ensuring that all the users get served faster.
This article shows gives you an overview on SQL Server 2016 row level security. You will also get to know the usages of row-level-security and how it works
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
Via a live example, show how to backup a database, simulate a failure backup the tail of the database transaction log and perform the restore.

813 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

8 Experts available now in Live!

Get 1:1 Help Now