From: | Aaron Holtz <aholtz(at)bright(dot)net> |
---|---|
To: | phd2(at)earthling(dot)net |
Cc: | pgsql-general(at)postgreSQL(dot)org |
Subject: | Re: [GENERAL] Any ideas why this doesn't work or how to rewrite it? |
Date: | 1999-04-28 17:08:41 |
Message-ID: | Pine.LNX.4.10.9904281307570.3898-100000@barbarossa.bright.net |
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Thread: | |
Lists: | pgsql-general |
Yes, that is what I'll have to do. Just counting the number of tuples
returned from this query would work. I was just wondering why this wasn't
implemented in postgres or what the valid syntax would be. Thanks!
--------------------------------------------------------------------------
Aaron Holtz
ComNet Inc.
UNIX Systems Specialist
Email: aholtz(at)bright(dot)net
"It's not broken, it just lacks duct tape."
--------------------------------------------------------------------------
On Apr 28, Oleg Broytmann molded the electrons to say....
>On Wed, 28 Apr 1999, Aaron Holtz wrote:
>> This seems like a simple SQL command, but I'm getting errors.
>> Running 6.5.0 under RedHat 5.2:
>>
>> db=> select count(distinct customer_username) from customerdata;
>> ERROR: parser: parse error at or near "distinct"
>>
>> How do you get a count of distinct data output via postgres? I can always
>> just count the number of tuples returned but this seemed to be a valid
>> query.
>
> In SQL, it is just pretty valid query. But Postgres does not implement
>SELECT COUNT(DISTINCT).
>
> Do instead
>SELECT DISTINCT(customer_username) FROM customerdata;
> and count it in your program.
>
>> --------------------------------------------------------------------------
>> Aaron Holtz
>> ComNet Inc.
>> UNIX Systems Specialist
>> Email: aholtz(at)bright(dot)net
>> "It's not broken, it just lacks duct tape."
>> --------------------------------------------------------------------------
>
>Oleg.
>----
> Oleg Broytmann http://members.xoom.com/phd2/ phd2(at)earthling(dot)net
> Programmers don't die, they just GOSUB without RETURN.
>
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