Re: [GENERAL] Aggregates and Joins
От | Oliver Elphick |
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Тема | Re: [GENERAL] Aggregates and Joins |
Дата | |
Msg-id | 199811242330.XAA01978@linda.lfix.co.uk обсуждение исходный текст |
Ответ на | Aggregates and Joins (Bob Dusek <bobd@palaver.net>) |
Ответы |
Re: [GENERAL] Aggregates and Joins
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Список | pgsql-general |
Bob Dusek wrote: ... >table second_table ( > > this_id int, > price money, > ... > .. > trans_id int, -- my primary key association > >); ... >What I need to do is to obtain the sum of the field 'price' from >second_table for every distinct 'trans_id' (all of which can be found in >first_table). ... Is there a quicker way to do this? Is it possible to >use the aggregate functions and have more than one row returned? select sum(price) from second_table group by trans_id; -- Oliver Elphick Oliver.Elphick@lfix.co.uk Isle of Wight http://www.lfix.co.uk/oliver PGP key from public servers; key ID 32B8FAA1 ======================================== "Jesus saith unto him, I am the way, the truth, and the life; no man cometh unto the Father, but by me." John 14:6
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