Question : Sql Join query - joining on multiple tables

Dear Experts,

I have never used join statements for more than 1 table - here I have to join 5 tables - I did manage to write the query and it returns correct results so far - but something tells me its not right.

This is my DB structure
Tables
Store - primary key store_id
Offer - primary key offer_id ( other fields include store_id)
User - primary key user_id
User_query - primary key user_query_id - This table has a foreign key relationship with User table (user_query.user_id = user.user_id)
Offer_Sent - primary key offer_sent_id - This table has a foreign key relationship with User_query table (offer_sent.user_query_id = user_query.user_query_id)
Offer_sent table also captures offer_id - but this column can also be null if no offers are found.

Now to find all the queries that have come in user_query table - if I write

select *
from offer_sent os,
             user_query uq,
             offer o,
             store s,
             user u
where uq.user_query_id=os.user_query_id
and os.offer_id = o.offer_id
and o.store_id = s.store_id
and u.user_id=uq.user_id

It will only return rows that have offer_id present in offer_Sent table. It wont include rows where offer_id is null

But this query seems to work:

select *
from offer_sent os
join user_query uq on uq.user_query_id=os.user_query_id
join user u on uq.user_id=u.user_id
left outer join offer o on os.offer_id=o.offer_id
left outer join store s on o.store_id = s.store_id

Can you take a look at the query and tell me if thats they way multiple tables should be joined
Appreciate your quick feedback
Thanks

Answer : Sql Join query - joining on multiple tables

try this ... your's is also correct

select *
from offer_sent os
inner join user_query uq on uq.user_query_id=os.user_query_id
inner join [user] u on uq.user_id=u.user_id
left outer join offer o on os.offer_id=o.offer_id
left outer join store s on o.store_id = s.store_id