join question

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От Frank Morton
Тема join question
Дата
Msg-id 027d01c276d8$504a1100$8455e5ce@edison
обсуждение исходный текст
Ответ на Re: date  ("wishy wishy" <wishy66@hotmail.com>)
Ответы Re: join question
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For the SQL gurus, a query where I'm not getting the expected
results. Trying to write it using sql compatible with both postgres
and mysql.
 
There are two tables:
 
table = profile
int id
char name
 
table = attribute
int id
int containerId
char name
char value
 
Multiple attribute rows correspond to a single profile row where
attribute.containerId = profile.id
 
These two queries result in one row being returned, which is
the expected result:
 
select name from profile where ((profile.state='1020811'));

select profile.name from profile,attribute where (((attribute.name='description') and (attribute.value='1020704') and (profile.id=attribute.containerId)));
But, I thought this next query would just be a simple way to combine the two
queries with an "or" operator, still returning one row, actually returns
ALL rows of attribute:

select profile.name from profile,attribute where ((profile.state='1020811') or ((attribute.name='marketsegment') and (attribute.value='1020704') and (profile.id=attribute.containerId)));
 
Why doesn't this last query return just one row?
 
TIA
 

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