Finding a Time Admin Instance Number

SQL to find the Time Admin instance number for a particular run.

-- -------------------------------------------------------
-- Get the instance number for the Time Admin temp tables
-- prompting for the process instance number.
-- -------------------------------------------------------  
  select '1' as INSTANCE
    from PS_TL_IPT11
   where PROCESS_INSTANCE = :PROCESS_INSTANCE
union
  select '2' as INSTANCE
    from PS_TL_IPT12
   where PROCESS_INSTANCE = :PROCESS_INSTANCE
union
  select '3' as INSTANCE
    from PS_TL_IPT13
   where PROCESS_INSTANCE = :PROCESS_INSTANCE
union
  select '4' as INSTANCE
    from PS_TL_IPT14
   where PROCESS_INSTANCE = :PROCESS_INSTANCE
union
  select '5' as INSTANCE
    from PS_TL_IPT15
   where PROCESS_INSTANCE = :PROCESS_INSTANCE
union
  select '6' as INSTANCE
    from PS_TL_IPT16
   where PROCESS_INSTANCE = :PROCESS_INSTANCE
union
  select '7' as INSTANCE
    from PS_TL_IPT17
   where PROCESS_INSTANCE = :PROCESS_INSTANCE
union
  select '8' as INSTANCE
    from PS_TL_IPT18
   where PROCESS_INSTANCE = :PROCESS_INSTANCE
union
  select '9' as INSTANCE
    from PS_TL_IPT19
   where PROCESS_INSTANCE = :PROCESS_INSTANCE
union
  select '10' as INSTANCE
    from PS_TL_IPT110
   where PROCESS_INSTANCE = :PROCESS_INSTANCE
union
  select '11' as INSTANCE
    from PS_TL_IPT111
   where PROCESS_INSTANCE = :PROCESS_INSTANCE
union
  select '12'
    from PS_TL_IPT112
   where PROCESS_INSTANCE = :PROCESS_INSTANCE
 union
  select '13' as INSTANCE
    from PS_TL_IPT113
   where PROCESS_INSTANCE = :PROCESS_INSTANCE