| From: | Ian Barwick <barwick(at)gmx(dot)net> |
|---|---|
| To: | Jakub Ouhrabka <jouh8664(at)ss1000(dot)ms(dot)mff(dot)cuni(dot)cz>, <pgsql-sql(at)postgresql(dot)org> |
| Subject: | Re: difficult query |
| Date: | 2002-05-04 15:44:48 |
| Message-ID: | 200205041744.48054.barwick@gmx.net |
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| Thread: | |
| Lists: | pgsql-sql |
On Saturday 04 May 2002 16:00, Jakub Ouhrabka wrote:
> Hi,
>
> I'd like to ask how to write sql query returning following results without
> using any other table than table1 (e.g. without outer join with table
> containing all possible day numbers...)
(...)
> I'd like to write query returning this:
>
> query results:
> day | number of records for a day
> ----------------------
> 1 | 2
> 2 | 1
> 3 | 0 <--- !!!
> 4 | 2
>
> Is it possible to do this in sql?
Basically, no. (You might be able to do it with the help
of a user-defined function though).
Why do you want to do this?
Ian Barwick
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