MS-SQL 2008 issues with multiple tables query - sql

Question

I need help with writing a SQL query. My tables are:
Contribution:
contribution_id | amount | person_id | currency_type
Person
Person_id | firstname | lastname
related related_id | person_id | related_personID
Currency Type CurrencyTypeID | CurrencyName
There are other tables and fields, but these are the ones I need.
Here is the problem I am having..
When a person contributes the first and last name is easy, but when a Brokerage firm contributes, I need to include the real person first name and last name (not the Brokerage Account).
The Brokerage is on the same table as the person.
So far, i have if the contribution.currencyType = '12492' then i need to get the information from related table to find the real person_id.
What I do get when I run the code below is all the data, except when the currencytype = 12492 then I get null for first and last name.
Here is my code so far:
`
declare #fund int = 165
declare #payment_luid int = 58
DECLARE #report_information TABLE(
ContributionID varchar(20),
ContributionDate date,
firstname varchar(50),
lastname varchar(50),
memberID varchar(20),
Pledge money,
cash money,
non_cash money,
fund_name VARCHAR(50))
INSERT INTO #report_information
SELECT c.contribution_id,
c.contribution_date,
case when c.currency_type = '12492' then t3.first_name else t1.first_name end,
case when c.currency_type = '12492' then t3.last_name else t1.last_name end,
case when c.currency_type = '12492' THEN t3.person_id else c.person_id end as MemberID,
case when c.currency_type = '12492' then (select amount From ctrb_pledge where ctrb_pledge.person_id = t3.person_id and fund_id = #fund) else (select amount from ctrb_pledge where ctrb_pledge.person_id = c.person_id and fund_id =#fund) END,
CASE WHEN C.currency_type_luid NOT IN (SELECT lookup_id FROM core_lookup WHERE lookup_type_id=#payment_luid AND lookup_qualifier2 ='1') THEN CCF.amount ELSE 0 END,
CASE WHEN CCF.non_cash = 1 OR C.currency_type IN (SELECT lookup_id FROM core_lookup WHERE lookup_type_id=#payment_luid AND lookup_qualifier2 ='1') THEN CCF.amount ELSE 0 END,
f.fund_name
FROM contribution as c
left join core_person as t1
on t1.person_id = c.person_id
left join relationship as t2
on t2.person_id = c.person_id
left join person as t3
on related_person_id = c.person_id
JOIN ctrb_contribution_fund CCF ON CCF.contribution_id=C.contribution_id
JOIN ctrb_fund F ON F.fund_id = CCF.fund_id
where f.fund_id = #fund
order by contribution_id
SELECT lastname
,firstname
,memberID
,coalesce(SUM(pledge),0) as Pledge
,SUM(cash) AS cash_gifts
,SUM(non_cash) AS non_cash_gifts
,SUM(cash + non_cash) as TotalGiving
,coalesce(SUM(pledge)-(SUM(cash)+SUM(non_cash)),0) as Balance
,fund_name
FROM #report_information
GROUP BY memberid, lastname, firstname, fund_name
ORDER BY lastname asc
`

Answer 1

I figured this problem out. By changing the join statements to FULL JOIN OUTER my missing records appeared.
join core_person as cp
on cp.person_id = c.person_id
full outer join core_relationship as rel
on rel.person_id = c.person_id
full outer join core_person as newCp
on rel.related_person_id = newcp.person_id
I did change my table to something I can remember. t1 = cp,t2 = rel,t3 = newcp.