Basic SQL question and kudos

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От Dennis Gearon
Тема Basic SQL question and kudos
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Msg-id 917399.21892.qm@web82107.mail.mud.yahoo.com
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Ответы Re: Basic SQL question and kudos  (Craig Ringer <craig@postnewspapers.com.au>)
Список pgsql-general
I need to get a join across about 8 tables to only return rows for the MAX date in one of the tables for all otherwise
identicalreturn results. I am trying to get the most recent edit of normalized records that are composed of elements
fromall the tables. There could be 1 to 100+ successive edits to the normalized/multi table record. The will be
approximately65,000 total records for now, 100,000,000s later. 

If I make one of the values in the select statement be MAX(the date), does that automatically do grouping on 'the date'
orwill I only get ONE row total returned? 

KUDOS, I almost never need to write the postgres group . . . because it just works. It's only using postgres that I
evereven read the digest that I receive.  

Soon I will have to write more to get performance tips. You guys are great on this list and seem to always have
answers,Thx.  
Dennis Gearon

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