Re: combining records from a single table and presenting them as one record
От | Abhishek |
---|---|
Тема | Re: combining records from a single table and presenting them as one record |
Дата | |
Msg-id | 506ca6630510280847m2a875f05y4897cce58e4adf8e@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: combining records from a single table and presenting them as one record (boinger <boinger@gmail.com>) |
Ответы |
Re: combining records from a single table and presenting them as one record
|
Список | pgsql-sql |
Using LIMIT 1 does return me a single record but please note that the table can have multiple guids for which I need a unique record with all the digit types combined. Using LIMIT 1 returns me always one record. :-(
--
Abhishek Jain
On 10/27/05, boinger <boinger@gmail.com> wrote:
On 10/27/05, Abhishek <ajcool@gmail.com> wrote:
> I am tryng to write a query which returns me a record like this
<snip>
> I do the query as this:
>
> select callguid , ( select digits from TABEL1 where type='a' ), ( select
> digits from TABEL1 where type='b' ), ( select digits from TABEL1 where
> type='c' ) from TABLE1;
<snip>
> Note that I get the records which i wanted, but I get them duplicated. If I
> use 'distinct' keyword I get the desired result with no duplication. But
> 'distinct' seems to be too expensive.
>
> Is there any better way I can do this without compromising the performance ?
Just add 'LIMIT 1' to the end of the query.
--
Abhishek Jain
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