Re: Results per letter query

am Thu, dem 21.06.2007, um 11:10:02 +0200 mailte Dani Castaños folgendes:
> Hi!
>
> I'm trying to build a query to get if there is an occurrence for a field
> for each alphabetical letter.
> My first thought to know it was to do something like:
>
> SELECT COUNT(field) FROM table WHERE UPPER( field ) LIKE UPPER( 'A%' )
> LIMIT 1;
> SELECT COUNT(field) FROM table WHERE UPPER( field ) LIKE UPPER( 'B%' )
> LIMIT 1;
> SELECT COUNT(field) FROM table WHERE UPPER( field ) LIKE UPPER( 'C%' )
> LIMIT 1;
> ...
> and so on...
>
> Is there any way to do it in only one query??

I'm not sure if i understand you correctly, sorry, if not.

test=*# select * from w;
t
--------
test
foo
bar
foobar
(4 rows)

test=*# select chr(x), count(1) from generate_series(65,90) x, w where
upper(substring (w.t from 1 for 1)) ~ chr(x) group by 1;
chr | count
-----+-------
T | 1
B | 1
F | 2
(3 rows)

Andreas
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Andreas Kretschmer
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