Re: [GENERAL] A select DISTINCT query? - followup Q

2008-01-28 Thread Gregory Stark
"Harald Fuchs" <[EMAIL PROTECTED]> writes: > If you want to select both columns, but have uniqueness over the first > only, you can use a derived table: > > SELECT tbl.name, tbl.comment > FROM tbl > JOIN (SELECT name FROM tbl GROUP BY name HAVING count(*) = 1) AS t > ON t.name = tbl.name > Or u

Re: [GENERAL] A select DISTINCT query? - followup Q

2008-01-28 Thread Harald Fuchs
In article <[EMAIL PROTECTED]>, Phil Rhoades <[EMAIL PROTECTED]> writes: > People, >> select count(*) as cnt, name from tst group by name having count(*) = 1 > This worked for my basic example but not for my actual problem - I get > "column comment must appear in the GROUP BY clause or be used i

Re: [GENERAL] A select DISTINCT query? - followup Q

2008-01-27 Thread Phil Rhoades
Mike, I can't do that with my comments - I get all six of the records in the result with the example instead of just four like I want . . but someone else had a solution without using the "group by" clause . . Phil. On Sun, 2008-01-27 at 13:56 -0500, Mike Ginsburg wrote: > Hi Phil, > Each of

Re: [GENERAL] A select DISTINCT query? - followup Q

2008-01-27 Thread Tom Lane
johnf <[EMAIL PROTECTED]> writes: > On Sunday 27 January 2008 10:56:18 am Mike Ginsburg wrote: >> Each of columns that you specify in your SELECT clause, must also >> appear in the GROPU BY clause. > Is the requirement of select fields matching group by fields a SQL92 > requirement or something t

Re: [GENERAL] A select DISTINCT query? - followup Q

2008-01-27 Thread johnf
On Sunday 27 January 2008 10:56:18 am Mike Ginsburg wrote: > Hi Phil, > Each of columns that you specify in your SELECT clause, must also > appear in the GROPU BY clause. > > SELECT COUNT(*) AS cnt, name, comment, ... > FROM tst > GROUP BY name, comment, ... > HAVING COUNT(*) = 1; > Is the requir

Re: [GENERAL] A select DISTINCT query? - followup Q

2008-01-27 Thread Mike Ginsburg
Hi Phil, Each of columns that you specify in your SELECT clause, must also appear in the GROPU BY clause. SELECT COUNT(*) AS cnt, name, comment, ... FROM tst GROUP BY name, comment, ... HAVING COUNT(*) = 1; Phil Rhoades wrote: People, select count(*) as cnt, name from tst group by nam

Re: [GENERAL] A select DISTINCT query? - followup Q

2008-01-27 Thread Phil Rhoades
People, > select count(*) as cnt, name from tst group by name having count(*) = 1 This worked for my basic example but not for my actual problem - I get "column comment must appear in the GROUP BY clause or be used in an aggregate function" errors so I have a related question: With table: nam