[SQL] join question

[Frank Morton]

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