Need advise on SQL Report base for APEX or jasper

Question

Hello everyone,
I need some advise on how to approach this below report requirement. It has been bugging me for nearly 2 weeks now, and my time is running out.
Here is a simplified version of the database
Four tables: Defendant, Engagement, Service, Event.
A defendant can have more than 1 engagement, but they have only one open engagement at a time.
For each engagement, they will have services and events.
These events can be just general events or events that relates to the service.
Here is the script for the tables and sample data
CREATE TABLE "DEFENDANT"
   ("DEF_ID" NUMBER,
     "FIRST_NAME" VARCHAR2(50 BYTE),
     "LAST_NAME" VARCHAR2(50 BYTE),
     "ACTIVE" NUMBER DEFAULT 1
Insert into DEFENDANT (DEF_ID,FIRST_NAME,LAST_NAME,ACTIVE) values (1,'Joe','Bloggs',1);
Insert into DEFENDANT (DEF_ID,FIRST_NAME,LAST_NAME,ACTIVE) values (2,'John','Doe',1);
CREATE TABLE "ENGAGEMENT"
   ("ENG_ID" NUMBER,
     "DEF_ID" NUMBER,
     "COURT_NAME" VARCHAR2(20 BYTE),
     "DATE_JOINED" DATE,
     "DATE_TERMINATED" DATE,
     "ETHNICITY" VARCHAR2(50 BYTE),
     "ACTIVE" VARCHAR2(20 BYTE)
Insert into ENGAGEMENT (ENG_ID,DEF_ID,COURT_NAME,DATE_JOINED,DATE_TERMINATED,ETHNICITY,ACTIVE) values (1,1,'AAA',to_date('01/09/12','DD/MM/RR'),to_date('20/09/12','DD/MM/RR'),'European','1');
Insert into ENGAGEMENT (ENG_ID,DEF_ID,COURT_NAME,DATE_JOINED,DATE_TERMINATED,ETHNICITY,ACTIVE) values (2,2,'BBB',to_date('01/10/12','DD/MM/RR'),null,'Asian','1');
Insert into ENGAGEMENT (ENG_ID,DEF_ID,COURT_NAME,DATE_JOINED,DATE_TERMINATED,ETHNICITY,ACTIVE) values (3,1,'AAA',to_date('22/09/12','DD/MM/RR'),null,'European','1');
CREATE TABLE "EVENT"
   ("EVENT_ID" NUMBER,
     "ENG_ID" NUMBER,
     "NOTES" VARCHAR2(20 BYTE),
     "RELATED_SERVICE_ID" NUMBER,
     "START_DATE" DATE,
     "END_DATE" DATE,
     "ACTIVE" NUMBER DEFAULT 1
Insert into EVENT (EVENT_ID,ENG_ID,NOTES,RELATED_SERVICE_ID,START_DATE,END_DATE,ACTIVE) values (1,1,null,1,to_date('01/09/12','DD/MM/RR'),to_date('02/09/12','DD/MM/RR'),1);
Insert into EVENT (EVENT_ID,ENG_ID,NOTES,RELATED_SERVICE_ID,START_DATE,END_DATE,ACTIVE) values (2,1,null,1,to_date('23/09/12','DD/MM/RR'),null,1);
Insert into EVENT (EVENT_ID,ENG_ID,NOTES,RELATED_SERVICE_ID,START_DATE,END_DATE,ACTIVE) values (3,1,null,2,to_date('15/10/12','DD/MM/RR'),to_date('16/10/12','DD/MM/RR'),1);
Insert into EVENT (EVENT_ID,ENG_ID,NOTES,RELATED_SERVICE_ID,START_DATE,END_DATE,ACTIVE) values (4,2,null,null,to_date('02/10/12','DD/MM/RR'),null,1);
Insert into EVENT (EVENT_ID,ENG_ID,NOTES,RELATED_SERVICE_ID,START_DATE,END_DATE,ACTIVE) values (5,2,null,2,to_date('03/10/12','DD/MM/RR'),null,1);
Insert into EVENT (EVENT_ID,ENG_ID,NOTES,RELATED_SERVICE_ID,START_DATE,END_DATE,ACTIVE) values (6,3,null,null,to_date('22/09/12','DD/MM/RR'),to_date('23/09/12','DD/MM/RR'),1);
Insert into EVENT (EVENT_ID,ENG_ID,NOTES,RELATED_SERVICE_ID,START_DATE,END_DATE,ACTIVE) values (7,3,null,4,to_date('23/09/12','DD/MM/RR'),null,1);
Insert into EVENT (EVENT_ID,ENG_ID,NOTES,RELATED_SERVICE_ID,START_DATE,END_DATE,ACTIVE) values (8,2,null,null,to_date('12/10/12','DD/MM/RR'),null,1);
CREATE TABLE "SERVICE"
   (     "SERVICE_ID" NUMBER,
     "ENG_ID" NUMBER,
     "DESCRIPTION" VARCHAR2(200 BYTE),
     "DATE_STARTED" DATE,
     "DATE_TERMINATED" DATE,
     "ACTIVE" NUMBER DEFAULT 1
Insert into SERVICE (SERVICE_ID,ENG_ID,DESCRIPTION,DATE_STARTED,DATE_TERMINATED,ACTIVE) values (1,1,'Counselling',to_date('15/09/12','DD/MM/RR'),to_date('18/09/12','DD/MM/RR'),1);
Insert into SERVICE (SERVICE_ID,ENG_ID,DESCRIPTION,DATE_STARTED,DATE_TERMINATED,ACTIVE) values (2,1,'Housing',to_date('20/09/12','DD/MM/RR'),null,1);
Insert into SERVICE (SERVICE_ID,ENG_ID,DESCRIPTION,DATE_STARTED,DATE_TERMINATED,ACTIVE) values (3,2,'Treatment',to_date('01/10/12','DD/MM/RR'),to_date('15/10/12','DD/MM/RR'),1);
Insert into SERVICE (SERVICE_ID,ENG_ID,DESCRIPTION,DATE_STARTED,DATE_TERMINATED,ACTIVE) values (4,3,'Housing',null,null,1);
Insert into SERVICE (SERVICE_ID,ENG_ID,DESCRIPTION,DATE_STARTED,DATE_TERMINATED,ACTIVE) values (5,1,'Other',to_date('05/10/12','DD/MM/RR'),null,0);
Insert into SERVICE (SERVICE_ID,ENG_ID,DESCRIPTION,DATE_STARTED,DATE_TERMINATED,ACTIVE) values (6,2,'Treatment',to_date('16/10/12','DD/MM/RR'),null,1);****
And this is the view I am thinking to use as the base for the report
CREATE OR REPLACE FORCE VIEW "BASE_VW"
AS
  SELECT Def.Def_Id,
    Def.First_Name,
    Def.Last_Name,
    Eng.Eng_Id,
    Eng.Court_Name,
    Eng.Date_Joined,
    Eng.Date_Terminated,
    Eng.Ethnicity,
    Ser.Service_Id,
    Ser.Description,
    Ser.Date_Started    AS Service_Start_Date,
    Ser.Date_Terminated AS Service_Date_Terminated,
    Ser.Active          AS Service_Active,
    Ev.Event_Id,
    Ev.Related_Service_Id,
    Ev.Start_Date,
    Ev.End_Date,
    Ev.Notes,
    ev.active AS event_active
  FROM Defendant Def
  LEFT OUTER JOIN Engagement Eng
  ON Def.Def_Id = Eng.Def_Id
  LEFT OUTER JOIN Service Ser
  ON Eng.Eng_Id = Ser.Eng_Id
  LEFT OUTER JOIN Event Ev
  ON Ev.Eng_Id = Eng.Eng_Id;****
Requirement:
Report parameter: Start Date, End Date, Court_name
From chosen Court_name, list defendants who currently engage in the court.
For each defendant display
Section 1: Identifying Details: First Name, Last Name, Ethnicity, Date Joined Court
Section 2: All Services currently active that the defendant attend
Section 3: All Events that related to the service that the defendant attend
Section 4: All other events (don't have Related Service ID)
User must be able to download the whole report in spreadsheet or PDF format.
I did try to create a set of union selects (but the format is not that good, when no data return it display nothing, I would rather show some messages like "There is no associated events, rather than nothing")
and it only produces report for 1 defendant at a time.
We use Oracle APEX , so only select statement or PL/SQL Code return select statement is valid for report source.
In our place we use Jasper Report adjacent to APEX, but I have very little experience with Jasper report.
The developer who knows a lot about jasper report is too busy to help me.
Currently, I use union selects like below:
With Current_Engagement As
( Select Eng_Id From Engagement
  Where Def_Id =2
  And Date_Joined Is Not Null
  And ( Date_Terminated Is Null Or Date_Terminated > Sysdate)
  And Rownum =1
Select '1.Defendant ID' as col1, 'First Name' as col2, 'Last Name' as col3, 'Court Name' as col4, 'Ethnicity' as col5, 'Date Joined' as col6, 'Date Terminated' as col7
From Dual
Union All
Select Distinct to_char(Def_Id), First_Name, Last_Name, Court_Name, Ethnicity, to_char(Date_Joined), to_char(Date_Terminated)
From Base_Vw Inner Join Current_Engagement Ce On Base_Vw.Eng_Id = Ce.Eng_Id
Union All
select '2.Service ID', 'Service Description', 'Start Date', 'End Date', Null, Null, Null
from dual
Union All
Select distinct to_char(service_id), description, to_char(service_start_date), to_char(service_date_terminated), null, null, null
From Base_Vw Inner Join Current_Engagement Ce On Base_Vw.Eng_Id = Ce.Eng_Id
where service_active =1
Union All
Select '3.Event ID', 'Related Service ID', 'Start Date', 'End date', 'Notes', null, null
From Dual
Union All
Select distinct to_char(event_id), to_char(related_service_id), to_char(start_date), to_char(end_date), notes, null, null
from Base_Vw Inner Join Current_Engagement Ce On Base_Vw.Eng_Id = Ce.Eng_Id
Where Event_Active = 1
and related_service_id is not null
Union All
Select '4.Event ID', 'Start Date', 'End date', 'Notes', null, null, null
From Dual
Union All
Select distinct to_char(event_id), to_char(start_date), to_char(end_date), notes, null, null, null
From Base_Vw Inner Join Current_Engagement Ce On Base_Vw.Eng_Id = Ce.Eng_Id
Where Event_Active = 1
and related_service_id is nulland the result is kind of what I try to achieve (except that I need to work on display a message 'No data found' rather than nothing), But it seems that my code works only for one defendant.
COL1                           COL2                           COL3                           COL4                 COL5                 COL6        COL7         
1.Defendant ID                 First Name                     Last Name                      Court Name           Ethnicity            Date Joined Date Terminated
2                              John                           Doe                            BBB                  Asian                01/10/12                   
2.Service ID                   Service Description            Start Date                     End Date                                                             
3                              Treatment                      01/10/12                       15/10/12                                                             
6                              Treatment                      16/10/12                                                                                            
3.Event ID                     Related Service ID             Start Date                     End date             Notes                                           
5                              2                              03/10/12                                                                                            
4.Event ID                     Start Date                     End date                       Notes                                                                
4                              02/10/12                                                                                                                           
8                              12/10/12                                                                                                                           
10 rows selected
     However, I struggle to find a way to apply this to more than 1 defendant and still keep the format.
Defendant 1
All details related to defendant 1
Defendant 2
All details relayed to defendant 2
Defendant n
All details relayed to defendant nIs it possible to display a report as above by using only SQL script ?
Thanks a lot in advance. I am willing to compensate financially to someone who can give me a solution.
Edited by: Ann586341. View base_vw SQL script is fixed.

Answer 1

Thanks a lot Jeneesh. (You are really a guru.)
It is nearly 98% what the requirements ask for.
I just have one more question.
If I add more information into the database, just one more defendant
Insert into DEFENDANT (DEF_ID,FIRST_NAME,LAST_NAME,ACTIVE) values (3,'Minnie','Mouse',1);
--and one in Engagement table
Insert into ENGAGEMENT (ENG_ID,DEF_ID,COURT_NAME,DATE_JOINED,DATE_TERMINATED,ETHNICITY,ACTIVE) values (4,3,'BBB',to_date('05/10/12','DD/MM/RR'),null,'Latin America','1');Then I run the select statment again (without changing anything)
With Current_Engagement As
( Select Eng_Id
  From Engagement
  Where /*Def_Id =2
  And*/ Date_Joined Is Not Null
  And ( Date_Terminated Is Null Or Date_Terminated > Sysdate)
  --And Rownum =1
titles as
( Select  .9 dummy_rn,'1.Defendant ID' as col1, 'First Name' as col2, 'Last Name' as col3,
    'Court Name' as col4, 'Ethnicity' as col5, 'Date Joined' as col6,
    'Date Terminated' as col7
  From Dual
  union all
  select  1.9,'2.Service ID', 'Service Description', 'Start Date', 'End Date',
    Null, Null, Null
  from dual
  union all
  Select  2.9,'3.Event ID', 'Related Service ID', 'Start Date', 'End date', 'Notes',
    null, null
  From Dual
  Union All
  Select 3.9,'4.Event ID', 'Start Date', 'End date', 'Notes', null, null, null
  From Dual
all_titles as
( select dummy_rn,eng_id,col1,col2,col3,col4,col5,col6,col7
  from current_engagement,titles
select col1,col2,col3,col4,col5,col6,col7
from (
      select dummy_rn,eng_id,col1,col2,col3,col4,col5,col6,col7
      from all_titles
      Union All
      Select Distinct 1,ce.eng_id,decode(Base_Vw.Eng_Id,null,'No Data',to_char(Def_Id)) def_id,
                      decode(Base_Vw.Eng_Id,null,'No Data',First_Name) First_Name,
                      decode(Base_Vw.Eng_Id,null,'No Data',last_Name) Last_Name,
                      decode(Base_Vw.Eng_Id,null,'No Data',court_Name) Court_Name,
                      decode(Base_Vw.Eng_Id,null,'No Data',ethnicity) Ethnicity,
             to_char(Date_Joined), to_char(Date_Terminated)
      From Base_Vw
              right outer join Current_Engagement Ce
              On Base_Vw.Eng_Id = Ce.Eng_Id
      Union All
      Select distinct 2,ce.eng_id,
            decode(Base_Vw.Eng_Id,null,'No Data',to_char(service_id)),
            decode(Base_Vw.Eng_Id,null,'No Data',description) ,
            decode(Base_Vw.Eng_Id,null,'No Data',to_char(service_start_date)),
            decode(Base_Vw.Eng_Id,null,'No Data',to_char(service_date_terminated)) ,
            decode(Base_Vw.Eng_Id,null,'No Data',null),
            decode(Base_Vw.Eng_Id,null,'No Data',null),
            decode(Base_Vw.Eng_Id,null,'No Data',null)
      From Base_Vw
              right outer Join Current_Engagement Ce
              On Base_Vw.Eng_Id = Ce.Eng_Id
      where service_active =1
      Union All
      Select distinct 3,ce.eng_id,
             decode(Base_Vw.Eng_Id,null,'No Data',to_char(event_id)),
             decode(Base_Vw.Eng_Id,null,'No Data',to_char(related_service_id)),
             decode(Base_Vw.Eng_Id,null,'No Data',to_char(start_date)),
             decode(Base_Vw.Eng_Id,null,'No Data',to_char(end_date)),
             decode(Base_Vw.Eng_Id,null,'No Data',notes),
             decode(Base_Vw.Eng_Id,null,'No Data',null),
             decode(Base_Vw.Eng_Id,null,'No Data',null)
      from Base_Vw
           right outer Join Current_Engagement Ce
           On Base_Vw.Eng_Id = Ce.Eng_Id
      Where Event_Active = 1
      and related_service_id is not null
      Union All
      Select distinct 4,ce.eng_id,
              decode(Base_Vw.Eng_Id,null,'No Data',to_char(event_id)),
              decode(Base_Vw.Eng_Id,null,'No Data',to_char(start_date)),
              decode(Base_Vw.Eng_Id,null,'No Data',to_char(end_date)),
              decode(Base_Vw.Eng_Id,null,'No Data',notes),
              decode(Base_Vw.Eng_Id,null,'No Data',null),
              decode(Base_Vw.Eng_Id,null,'No Data',null),
              decode(Base_Vw.Eng_Id,null,'No Data',null)
      From Base_Vw
          right outer Join Current_Engagement Ce
          On Base_Vw.Eng_Id = Ce.Eng_Id
      Where Event_Active = 1
      and related_service_id is null
order by eng_id,dummy_rn,col1
;The result is
COL1                           COL2                           COL3                      COL4                 COL5                      COL6        COL7         
1.Defendant ID                 First Name                     Last Name                 Court Name           Ethnicity                 Date Joined Date Terminated
2                              John                           Doe                       BBB                  Asian                     01/10/12                   
2.Service ID                   Service Description            Start Date                End Date                                                                  
3                              Treatment                      01/10/12                  15/10/12                                                                  
6                              Treatment                      16/10/12                                                                                            
3.Event ID                     Related Service ID             Start Date                End date             Notes                                                
5                              2                              03/10/12                                                                                            
4.Event ID                     Start Date                     End date                  Notes                                                                     
4                              02/10/12                                                                                                                           
8                              12/10/12                                                                                                                           
1.Defendant ID                 First Name                     Last Name                 Court Name           Ethnicity                 Date Joined Date Terminated
1                              Joe                            Bloggs                    AAA                  European                  22/09/12                   
2.Service ID                   Service Description            Start Date                End Date                                                                  
4                              Housing                                                                                                                            
3.Event ID                     Related Service ID             Start Date                End date             Notes                                                
7                              4                              23/09/12                                                                                            
4.Event ID                     Start Date                     End date                  Notes                                                                     
6                              22/09/12                       23/09/12                                                                                            
1.Defendant ID                 First Name                     Last Name                 Court Name           Ethnicity                 Date Joined Date Terminated
3                              Minnie                         Mouse                     BBB                  Latin America             05/10/12                   
2.Service ID                   Service Description            Start Date                End Date                                                                  
3.Event ID                     Related Service ID             Start Date                End date             Notes                                                
4.Event ID                     Start Date                     End date                  Notes                                                                     
23 rows selected Is it possible in SQL to display it like this
COL1                           COL2                           COL3                      COL4                 COL5                      COL6        COL7         
1.Defendant ID                 First Name                     Last Name                 Court Name           Ethnicity                 Date Joined Date Terminated
2                              John                           Doe                       BBB                  Asian                     01/10/12                   
2.Service ID                   Service Description            Start Date                End Date                                                                  
3                              Treatment                      01/10/12                  15/10/12                                                                  
6                              Treatment                      16/10/12                                                                                            
3.Event ID                     Related Service ID             Start Date                End date             Notes                                                
5                              2                              03/10/12                                                                                            
4.Event ID                     Start Date                     End date                  Notes                                                                     
4                              02/10/12                                                                                                                           
8                              12/10/12                                                                                                                           
1.Defendant ID                 First Name                     Last Name                 Court Name           Ethnicity                 Date Joined Date Terminated
1                              Joe                            Bloggs                    AAA                  European                  22/09/12                   
2.Service ID                   Service Description            Start Date                End Date                                                                  
4                              Housing                                                                                                                            
3.Event ID                     Related Service ID             Start Date                End date             Notes                                                
7                              4                              23/09/12                                                                                            
4.Event ID                     Start Date                     End date                  Notes                                                                     
6                              22/09/12                       23/09/12                                                                                            
1.Defendant ID                 First Name                     Last Name                 Court Name           Ethnicity                 Date Joined Date Terminated
3                              Minnie                         Mouse                     BBB                  Latin America             05/10/12                   
2.Service ID                   Service Description            Start Date                End Date                                                                  
No Service Found
3.Event ID                     Related Service ID             Start Date                End date             Notes                                                
No Event Found
4.Event ID                     Start Date                     End date                  Notes                                                              
No Event FoundOr just a 'No data found' would do. I am thinking about create a dummy table which contains only one row with text "There is no data found". And so the outer join with the result, but I still cannot work out how to integrate with the condition in your select statement.
I really appreciate your help.