Antw: [SQL] query with subquery abnormally slow? - Mailing list pgsql-sql

>>> Oskar Liljeblad <osk@hem.passagen.se> 01.11.1999  19.47 Uhr >>>
>>I'm doing a SELECT query with a subquery on a table with 12K rows
>>but it is very slow (10 seconds+). The query looks like this:
>>
>>  select *
>>   from items
>>   where package in
>>      (select package
>>         from items
>>         where ...blah...
>>         group by package)
>> .....

I am sorry  if I am still sleeping and don't see the problem, but what is the difference between this querry and the
following:

select *  from items      where ...blah...

Gerhard