Re: Query question

On 01/26/2012 04:00 AM, John Tuliao wrote:
> I seem to have a problem with a specific query:
>
> The inside query seems to work on it's own:
>
> select prefix
> from john_prefix
> where strpos(jpt_test.number,john_prefix.prefix) = '1'
> order by char_length(john_prefix.prefix) desc limit 1
>
> but when I execute it with this:
>
> UPDATE
> jpt_test
> set
> number = substring(number from length(john_prefix.prefix)+1)
> from
> john_prefix
> where
> prefix in (
> select prefix
> from john_prefix
> where strpos(jpt_test.number,john_prefix.prefix) = '1'
> order by char_length(john_prefix.prefix) desc limit 1
> ) ;
>
> table contents are as follows
>
> john_prefix table:
>
> prefix
> ---------
> 123
> 234
>
> jpt_test table:
>
> number
> -----------
> 1237999999
> 0234999999 <<< supposed to have no match
> 2349999999
>
> Am I missing something here? Any help will be appreciated.

I'm going to guess that it's because you didn't use a separate alias for the
FROM in the correlated subquery.

Doesn't STRPOS() return INTEGER, not TEXT?

--
Lew
Honi soit qui mal y pense.
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