How to create a hierarchy

Question

Hi
I have a table like this
12933     Contracting Process                     12958     Owner Scope Process      
12934     Licensing and Permissions Process     13036     Construction Licence Process
12935     Technical Process                             13057     Documentation for Letter of Confort     
12938     Milestones / Key Activities             13044     Milestones / Key Activities                    
12935     Technical Process                             12988     Capablt. to Withstand Loads from Exte     
12935     Technical Process                             12987     Compliance Assesm. to Regulatory
12935     Technical Process                              12986     CNPP Technological Systems     
12934     Licensing and Permissions Process     13031     Site Licence Process     
12936     Financing and Economic Process     12992     Financial Model (FA) Process     
12933     Contracting Process                     13025     EPC - Pre-Tender Phase Process
12933     Contracting Process                     13021     EPC - Contract Award Processand I nned to create a hierarhy in another table from this something like
Contracting Process                   
                           Owner Scope Process     
                           EPC - Pre-Tender Phase Process
                           EPC - Contract Award Process
Technical Process
                          Documentation for Letter of Confort     
                          Capablt. to Withstand Loads from Exte     
                          CNPP Technological Systems     How can I do this?
Thank you

Answer 1

Usually you would use two tables for that task.
First Table (master-table could be:
create table Process_type
  process_type_id number,
  process_type_name varchar2(100)
);Second table with Processes could be:
create table process
  Process_type_id number,
  Process_id number,
  Process_name varchar2(100)
);Entries in first table would be:
process_type_id  process_type_name
12933   Contracting Process
12935   Technical Process
...Second table (detail-table) could look like
process_type_id process_id  process_name
12933 12958 Owner Scope Process
12933 13025 EPC - Pre-Tender Phase Process
12935 13057 Documentation for Letter of Confort
...