A. Kretschmer escribió:
In response to Linos :
Hello,
i have a query that returns a result set like this:
item | size | stock
123 | XL | 10
123 | XXL | 5
123 | XS | 3
and i would like get the results like this:
item | XL | XXL | XS
123 | 10 | 5 | 3
Other solution with plain SQL:
test=*# select * from linos ;
item | size | stock
------+------+-------
123 | XL | 10
123 | XXL | 5
123 | XS | 3
(3 rows)
test=*# select item, sum(case when size='XL' then stock else 0 end) as
"XL", sum(case when size='XXL' then stock else 0 end) as "XXL", sum(case
when size='XS' then stock else 0 end) as "XS" from linos where item=123
group by item;
item | XL | XXL | XS
------+----+-----+----
123 | 10 | 5 | 3
(1 row)
Andreas
I think this approach have a problem (almost with my data), i have a somewhat
large number of different sizes, about 200 or so (although i have a presented a
limited example i now). Thanks anyway by the alternative way to do it Andreas.
Regards,
Miguel Angel.
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