Getting data of two records in one line using SQL

Question

Hi,
We have a COMPANY_RESEARCH table that maps companies to the Research Universes that do research on them. This table has:
COMPANY_ID VARCHAR2(100), foreign key to COMPANY table.
RESEARCH_UNIT_ID CHAR(1)
Valid values for RESEARCH_UNIT_ID are 1(US Equity), 2(Canadian Equity) and 3(Debt security).
Within my COMPANY_RESEARCH_ID table, I have:
COMPANY_ID RESEARCH_UNIT_ID
aaaa 2
aaaa 3
How can I write a SQL query that gives me the output?
Company Id Equity Debt
aaaa Canada Yes
My attempt was as below:
select
     FILTERED_COMPANIES.COMPANY_ID as Company,
     DECODE(FILTERED_COMPANIES.RESEARCH_UNIT_ID,'1','US','2','Canada','3','N/A') As Equity,
     DECODE(FILTERED_COMPANIES_1.RESEARCH_UNIT_ID,'1','N/A','2','N/A','3','Yes') as Debt
FROM
          select distinct
          company_id, research_unit_id
          from company_research_relation
     )FILTERED_COMPANIES,
          select distinct
          company_id, research_unit_id
          from company_research_relation
     )FILTERED_COMPANIES_1
WHERE
     FILTERED_COMPANIES.COMPANY_ID = FILTERED_COMPANIES_1.COMPANY_ID
     AND FILTERED_COMPANIES.RESEARCH_UNIT_ID = FILTERED_COMPANIES_1.RESEARCH_UNIT_ID
but that produces output as below:
Company Id Equity Debt
aaaa Canada N/A
aaaa N/A Yes
Thanks in advance..

Answer 1

Hi,
how about this one?
SELECT select_equity.company_id, enquity, dept, select_equity.research_unit_id, SELECT_dept.research_unit_id
FROM
(SELECT company_id, research_unit_id, DECODE(RESEARCH_UNIT_ID,'1','US','2','Canada','3','N/A') enquity FROM company_research) select_equity,
(select company_id, research_unit_id, DECODE(RESEARCH_UNIT_ID,'1','N/A','2','N/A','3','Yes') Dept FROM company_research) SELECT_dept
WHERE select_equity.company_id = SELECT_dept.company_id
AND enquity != 'N/A'
AND dept != 'N/A';
Regards,
Gerd