join question
| 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
|
| Список | pgsql-sql |
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)));
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
В списке pgsql-sql по дате отправления: