From: Martijn Tonies
Date: November 6 2006 11:34am
Subject: Re: Convert hex to decimal?
List-Archive: http://lists.mysql.com/mysql/203154
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> I have a table with a SMALLINT column that -- trough a mistake --
> contains values like 57, 13 etc. which in fact are 0x57 and 0x13 (i.e.
> HEX numbers).
>
> How would I convert
>
> 13 ("false decimal") to 0x13 (Hex) and from there to 19 (decimal)?
>
> I tried my luck with UNHEX and CAST but I only got 0 or NULL back
respectively.

This seems to work:

select cast(x'13' as unsigned)

So treat the column as a string (or cast it like that) and use this cast.

Martijn Tonies
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