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Asked: 2026-05-14T05:31:18+00:00

I’ve got this value ‘0310D45’ I’m using isnumeric to check if values are numeric

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I’ve got this value ‘0310D45’

I’m using isnumeric to check if values are numeric prior to casting to a bigint. Unfortunately this value is passing the isnumeric check. So my query is failing saying:

Msg 8114, Level 16, State 5, Line 3
Error converting data type varchar to bigint.

What is the simplest way to handle this. I was thinking of using charindex but I would have to check all 26 letters.

Is there a simple solution that I’m not seeing? I really don’t want to create a user defined function.

Thanks

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1 Answer

  1. Editorial Team

    Take a look at this article named What is wrong with IsNumeric()? which contains the following abstract:

    Abstract: T-SQL’s ISNUMERIC() function has a problem. It can falsely interpret
    non-numeric letters and symbols (such as D, E, and £), and even tabs
    (CHAR(9)) as numeric.

    Unfortunately it looks like IsNumeric is just plain weird and you will have to write a few lines of T-SQL to get around it. (By weird I mean that IF the data evaluated can be converted into ANY numeric type at all, the it will get converted.)

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