AutoGenerate Numeric ID’s in SQL Server with No Sequence

Sometime back, I had written a post to AutoGenerate an AlphaNumeric Sequence in SQL Server

Tumo Jobas wrote back today asking if it was possible to use a similar method to generate a 10 digit number but with no sequence. Here’s one way that SQL MVP Peter Larsson uses often using NEWID() and I think it’s pretty slick. This solution will work in SQL Server 2005/2008.

ID int, CircuitName varchar(10),
NonSeqID AS ABS(CHECKSUM(NEWID())) % 9000000000 + 1000000000

SELECT 1, 'Circuit 1' UNION ALL
SELECT 2, 'Circuit 2' UNION ALL
SELECT 3, 'Circuit 3' UNION ALL
SELECT 4, 'Circuit 4' UNION ALL
SELECT 5, 'Circuit 5' UNION ALL
SELECT 6, 'Circuit 6' UNION ALL
SELECT 7, 'Circuit 7' UNION ALL
SELECT 8, 'Circuit 8' UNION ALL
SELECT 9, 'Circuit 9' UNION ALL
SELECT 10, 'Circuit 10'




As shown above, the NonSeqID gets generated automatically using the NEWID() system function.

About The Author

Suprotim Agarwal, MCSD, MCAD, MCDBA, MCSE, is the founder of DotNetCurry, DNC Magazine for Developers, SQLServerCurry and DevCurry. He has also authored a couple of books 51 Recipes using jQuery with ASP.NET Controls and a new one recently at The Absolutely Awesome jQuery CookBook.

Suprotim has received the prestigous Microsoft MVP award for nine times in a row now. In a professional capacity, he is the CEO of A2Z Knowledge Visuals Pvt Ltd, a digital group that represents premium web sites and digital publications comprising of Professional web, windows, mobile and cloud developers, technical managers, and architects.

Get in touch with him on Twitter @suprotimagarwal, LinkedIn or befriend him on Facebook

1 comment:

starsky51 said...

Are these sequence numbers intended to be unique? I know it's a long shot but, in a big enough table, this will produce duplicates.