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Asked: 2026-05-30T06:57:19+00:00

In my database, I have a computed column based off of the ID field.

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In my database, I have a computed column based off of the ID field. Its formula is like so:

('Q'+right('00000'+CONVERT([varchar],[EnquiryID],(0)),(6)))

This means it’ll prepend 0’s upto 6 digits long. For example if my ID was 5, it’ll be Q000005. If its 100 it’ll be Q000100.

I’ve noticed that my ID is already at 4000 after just a few weeks. So my computed column looks like Q004000.

My question is, once it gets to say Q999999. Will it start at 1 again or add another 0 automatically? So will it go back to Q000001 or will it be Q1000000?

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1 Answer

  1. Editorial Team

    Let’s use our brain cells and logically analyze this:

    • your EnquiryID value goes to 1’000’000 – so your CONVERT(varchar, EnquiryID, 0) returns 1000000
    • next you prepend this with five zeroes, which gives you: 000001000000
    • now you take the six right-most characters of that, which are: 000000
    • and you prepend a Q giving you the result of Q000000

    So I guess you better drop that computed column and re-create it with more digits! 🙂

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