RE: Group by column and Sum another
Thanks! That did the trick. -Original Message- From: Olexandr Melnyk [mailto:omel...@gmail.com] Sent: Monday, July 20, 2009 10:02 AM To: mysql@lists.mysql.com Subject: Re: Group by column and Sum another select contract , sum(amlp) from maintenance group by contract; On Mon, Jul 20, 2009 at 6:50 PM, Hagen wrote: > I am hoping I can get some help with a query I am trying to construct: > > I want to group by a 'contract' column and get the sum of the 'amlp' column > values associated with each contract. I can do a select and group by on > contract > > select contract from maintenance group by contract; > > and I will get each unique contract. However, I want to sum the amlp values > per unique contract and I am not sure how to construct that select > statement. > > I tried: > > select contract , sum(amlp) from maintenance where contract=(select > contract > from maintenance group by contract); > > But that resulted in a "ERROR 1242 (21000): Subquery returns more than 1 > row" error. > > Any suggestions? > > Hagen Finley > > Boulder > > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe:http://lists.mysql.com/mysql?unsub=omel...@gmail.com > > -- Sincerely yours, Olexandr Melnyk http://omelnyk.net/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Group by column and Sum another
select contract , sum(amlp) from maintenance group by contract; On Mon, Jul 20, 2009 at 6:50 PM, Hagen wrote: > I am hoping I can get some help with a query I am trying to construct: > > I want to group by a 'contract' column and get the sum of the 'amlp' column > values associated with each contract. I can do a select and group by on > contract > > select contract from maintenance group by contract; > > and I will get each unique contract. However, I want to sum the amlp values > per unique contract and I am not sure how to construct that select > statement. > > I tried: > > select contract , sum(amlp) from maintenance where contract=(select > contract > from maintenance group by contract); > > But that resulted in a "ERROR 1242 (21000): Subquery returns more than 1 > row" error. > > Any suggestions? > > Hagen Finley > > Boulder > > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe:http://lists.mysql.com/mysql?unsub=omel...@gmail.com > > -- Sincerely yours, Olexandr Melnyk http://omelnyk.net/
Group by column and Sum another
I am hoping I can get some help with a query I am trying to construct: I want to group by a 'contract' column and get the sum of the 'amlp' column values associated with each contract. I can do a select and group by on contract select contract from maintenance group by contract; and I will get each unique contract. However, I want to sum the amlp values per unique contract and I am not sure how to construct that select statement. I tried: select contract , sum(amlp) from maintenance where contract=(select contract from maintenance group by contract); But that resulted in a "ERROR 1242 (21000): Subquery returns more than 1 row" error. Any suggestions? Hagen Finley Boulder -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
