Displaying items in a query with no value - mysql

Question

I have written the following query:
select title, branch_name, no_of_copies
from Book_Copies BC
inner join Book B on BC.book_id = B.book_id
inner join Library_Branch LB on BC.branch_id = LB.branch_id
where title = 'Grapes of Wrath';
But my issue is that this displays only the titles and branch names that have > 0 no_of_copies. How do I display ones that do not have a no_of_copies row? (Where it would be equal to 0).
Here is the table I currently get:
+-----------------+-------------+--------------+
| title | branch_name | no_of_copies |
+-----------------+-------------+--------------+
| Grapes of Wrath | Central | 5 |
| Grapes of Wrath | Allentown | 2 |
+-----------------+-------------+--------------+
This is what I need it to be:
+-----------------+-------------+--------------+
| title | branch_name | no_of_copies |
+-----------------+-------------+--------------+
| Grapes of Wrath | Central | 5 |
| Grapes of Wrath | Allentown | 2 |
| Grapes of Wrath | Sharpstown | 0 |
+-----------------+-------------+--------------+

Answer 1

You need to use an outer join instead starting from the book table. Perhaps something like this:
select title, branch_name, no_of_copies
from Book B
left join Book_Copies BC on BC.book_id = B.book_id
left join Library_Branch LB on BC.branch_id = LB.branch_id
where title = 'Grapes of Wrath';
Reading your comments, it sounds like you want to use a cross join between book and library_branch to get all combinations of books and branches (otherwise known as a cartesian product). Then outer join those results to the lookup table:
select title, branch_name, coalesce(no_of_copies,0) copies
from Book B
cross join Library_Branch LB
left join Book_Copies BC on BC.book_id = B.book_id
and BC.branch_id = LB.branch_id
where title = 'Grapes of Wrath';