Обсуждение: Re: [HACKERS] AND &&
Thomas Lockhart <lockhart@alumni.caltech.edu> said: > > I think I asked this before but don't recall seeing an answer. Do we > > have a logical AND? > > Uh, yes. It's called "AND" ;) That's what I was afraid of. ERROR: left-hand side of AND is type 'int4', not bool Vince. -- ========================================================================== Vince Vielhaber -- KA8CSH email: vev@michvhf.com http://www.pop4.net 128K ISDN - $24.95/mo or less; 56K Dialup - $17.95/mo or less www.pop4.net Online Campground Directory http://www.camping-usa.com Online Giftshop Superstore http://www.cloudninegifts.com ==========================================================================
At 11:00 AM 12/15/99 -0500, Vince Vielhaber wrote: >Thomas Lockhart <lockhart@alumni.caltech.edu> said: > >> > I think I asked this before but don't recall seeing an answer. Do we >> > have a logical AND? >> >> Uh, yes. It's called "AND" ;) > >That's what I was afraid of. > > ERROR: left-hand side of AND is type 'int4', not bool >SELECT (( sum(case dict.word when 'enable' then 1 else 0 end) && sum(case >dict.word when 'test' then 1 else 0 end))) try something like select ((sum(case dict.work when 'enable' then 1 else 0 end) > 0 and sum(case dict.word when 'test' then 1 else 0end) > 0)) or perhaps rewrite the query to use "exists"??? That appears to be the point of this snippet. Apparently mySQL is misnamed. Perhaps it should be renamed myC-ishQL. - Don Baccus, Portland OR <dhogaza@pacifier.com> Nature photos, on-line guides, Pacific Northwest Rare Bird Alert Serviceand other goodies at http://donb.photo.net.
Vince Vielhaber <vev@michvhf.com> writes:
>> Uh, yes. It's called "AND" ;)
> That's what I was afraid of.
> ERROR: left-hand side of AND is type 'int4', not bool
1 => 't'::bool, etc.
regards, tom lane
I wrote:
> 1 => 't'::bool, etc.
Er, ignore that ... I missed the sum() operator. Don Baccus has
more reasonable comments ...
regards, tom lane