Nested Case Statement

Question

Hello,
I need help implementing multiple Case Statements in a select statement. I can not get this to work in one statement.
Select Statement
select distinct
allt.fk_jobcode_id as Job_Code,
allt.fk_jobcode_descr as Classification,
sum(allt.number_of_positions) as Number_Allotted,
sum(number_of_positions) as Sum_Number_Allotted,
     dept.department_name|| ''||nvl2((CASE WHEN div.division_name <> 'N/A'
    THEN div.division_name 
  END),'/'||DIV.DIVISION_NAME||'',null) as Department_Division,
allt.fund_type as Fund
from tbl_allotment allt, tbl_department dept, tbl_division div
where isdeleted <> 'Y'
and ALLT.FK_DEPARTMENT_ID = dept.department_id
and ALLT.FK_DIVISION_ID = div.division_id
group by fk_jobcode_id, fk_jobcode_descr, fund_type, department_name, division_name
HAVING (count(fk_jobcode_descr ) = 1)
order by Classification asc, Department_Division asc1st CASE Statement combines the Department_Name and Division_Name values but does not display the Division_Name if the value is 'N/A'.
     dept.department_name|| ''||nvl2((CASE WHEN div.division_name <> 'N/A'
    THEN div.division_name 
  END),'/'||DIV.DIVISION_NAME||'',null) as Department_Division,value: Council Administrator's Office/Administration
value: Council Administrator's Office/N/A will display as Council Administrator's Office
I need to extend this now by using this CASE Statement, which displays the text 'Public Works' if the Department_Id = 00072.
     (CASE dept.department_id
     When '00072' then 'Public Works'
     Else dept.Department_Name
     End) as Department_Name, incorrect: Road Rehab Program/GLP Transportation Program Admin
Should populate as: Public Works/GLP Transportation Program Admin
select distinct
allt.fk_jobcode_id as Job_Code,
allt.fk_jobcode_descr as Classification,
sum(allt.number_of_positions) as Number_Allotted,
sum(number_of_positions) as Sum_Number_Allotted,
     dept.department_name|| ''||nvl2((CASE WHEN div.division_name <> 'N/A'
    THEN div.division_name 
  END),'/'||DIV.DIVISION_NAME||'',null) as Department_Division,
  (CASE dept.department_id
     When '00072' then 'Public Works'
    ELSE dept.Department_Name|| ''||nvl2((CASE WHEN div.division_name <> 'N/A'
    THEN div.division_name 
       END),'/'||DIV.DIVISION_NAME||'',null)
  END) as Department_Name1,
allt.fund_type as Fund
from tbl_allotment allt, tbl_department dept, tbl_division div
where isdeleted <> 'Y'
and ALLT.FK_DEPARTMENT_ID = dept.department_id
and ALLT.FK_DIVISION_ID = div.division_id
group by fk_jobcode_id, fk_jobcode_descr, fund_type, department_name, division_name, department_id
HAVING (count(fk_jobcode_descr ) = 1)
order by Classification asc, Department_Division ascbut once I modify the select statement I am only getting value 'Public Works' for Department_Division value. Does not populate the Division_Name data. Does anyone know how to combine these CASE Statements? Thanks for reading this Thread also.

Answer 1

Hi,
I think you want something like this:
SELECT       ...
,       CASE
           WHEN  department_id = '00072'
           THEN  'Public Works'
           ELSE  dept.department_name
       END
       ||
       CASE
           WHEN  div.division_name != 'N/A'
           THEN  '/' || div.division_name
       END          AS department_name1
...Whenever you have a problem, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) from all tables.
Also post the results you want from that data, and an explanation of how you get those results from that data, with specific examples.
Always say which version of Oracle you're using.