Re: Re: BETWEEN clause
От | will trillich |
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Тема | Re: Re: BETWEEN clause |
Дата | |
Msg-id | 20010424020850.H27356@serensoft.com обсуждение исходный текст |
Ответ на | Re: BETWEEN clause (Joel Burton <jburton@scw.org>) |
Ответы |
Re: Re: BETWEEN clause
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Список | pgsql-general |
On Tue, Apr 24, 2001 at 12:07:41AM -0400, Joel Burton wrote: > On Mon, 23 Apr 2001, Paul Tomblin wrote: > > > Is the "BETWEEN" clause inclusive or exclusive? ie if I say "WHERE > > latitude BETWEEN 45 and 55", will I get examples where the latitude equals > > 45 or not? Also, is "latitude BETWEEN 45 and 55" any more efficient than > > "latitude >= 45 AND latitude <= 55", or is it just a stylistic thing? > > yes, yes, and no: > > > select 'exclusive' where 2 between 1 and 3; > ?column? > ---------- > inclusive > > test=# select 'inclusive' where 1 between 1 and 3; > ?column? > ---------- > inclusive > > test=# create view its_really_the_same_thing as select true where 1 > between 1 and 3; > > test=# \d its_really_the_same_thing > ... > View definition: SELECT 't'::bool WHERE ((1 >= 1) AND (1 <= 3)); > > > HTH, > -- > Joel Burton <jburton@scw.org> > Director of Information Systems, Support Center of Washington just wanted to say -- BEAUTIFULLY executed reply. not only did you answer the query succinctly and completely, you showed, quite clearly, how to find out such answers. "teach a man to fish..." delightful! -- don't visit this page. it's bad for you. take my expert word for it. http://www.salon.com/people/col/pagl/2001/03/21/spring/index1.html will@serensoft.com http://sourceforge.net/projects/newbiedoc -- we need your brain! http://www.dontUthink.com/ -- your brain needs us!
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