Adding values that don't exist in SELECT statement output - sql

Question

I am not sure how to ask this, due to my lack of experience, so please bear with me.
I am using a SELECT statement to extract pending applications (i.e. no completed date) and counting their totals (plus some other counting). There are certain project types that I need to gather from, 8 of them, where only 4 of them currently have a pending application. I still need to show the other project types with a 0 in the count column. If I try to union with a query that will pull all data, pending or not, I get duplicate rows (minus the count columns) for the 4 project types with currently pending applications. If I left join to the project type table, I get a null row. Neither are what I want. Does anyone have any suggestions?
Output of the union:
General Construction 0 0 90 0
General Coverage 0 0 90 0
General Coverage 1 740 90 90
General Renewal 0 0 90 0
Individual Construction 0 0 90 0
Individual Coverage 0 0 180 0
Individual Renewal 0 0 90 0
Individual Renewal 2 1027 90 180
Approval 0 0 90 0
Approval 22 565 90 1980
Other - Renewal 0 0 90 0
Other - Renewal 21 1119 90 1890
Output without the necessary '0' rows:
General Coverage 1 740 90 90
Individual Renewal 2 1027 90 180
Other - Renewal 21 1119 90 1890
Approval 22 566 90 1980
Output that I would like to see is:
General Construction 0 0 90 0
General Coverage 1 740 90 90
General Renewal 0 0 90 0
Individual Construction 0 0 90 0
Individual Coverage 0 0 180 0
Individual Renewal 2 1027 90 180
Approval 22 565 90 1980
Other - Renewal 21 1119 90 1890
Please let me know what else I can provide to help you help me.

Answer 1

You don't provide names of your columns or anything like that.
What you need is a driver table with all valid values. You can then use left outer join to get the result set you want:
select driver.val, coalesce(q.col2, 0), coalesce(q.col3, 0), coalesce(q.col4, 0)
from (select 'General Construction' as val from dual union all
select 'General Coverage' as val from dual union all
select 'General Renewal' as val from dual union all
select 'Individual Construction' as val from dual union all
select 'Individual Coverage' as val from dual union all
select 'Individual Renewal' as val from dual union all
select 'Approval' as val from dual union all
select 'Other - Renewal' as val from dual
) driver left outer join
(query without 0 rows) q
on driver.val = q.col1
If NULLs are okay instead of 0s, then the coalesce() is not needed.