Re: "order by" weirdness
От | Dipankar Chakrabarti |
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Тема | Re: "order by" weirdness |
Дата | |
Msg-id | 19990927075232.4435.rocketmail@web117.yahoomail.com обсуждение исходный текст |
Ответ на | "order by" weirdness (Hein Roehrig <hein@acm.org>) |
Ответы |
Re: [SQL] Re: "order by" weirdness
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Список | pgsql-sql |
>Hello, Dear Hein, What are you trying to do with order by max(date)? Order by date will give proper result. For that matter group by clause already does ordering, no need to put a order by there. Regards, Dipankar >consider these three statements: > >create table t (id integer, date datetime ) ; >select id from t group by id ; >select id from t group by id order by max(date) ; > >Is it correct behavior that the second select returns >one row where >as the first select returns zero rows? >Thanks in advance for any help, >Hein __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.com
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