Getting the values MIN and MAX of the table data

I have the table and the following records.
create table test_bank ( trans_id  number ,   trans_date   date ,    trans_amt    number ,      debit_credit_indicator varchar2(3) )

Insert into TEST_BANK
   (TRANS_ID, TRANS_DATE, TRANS_AMT, DEBIT_CREDIT_INDICATOR)
 Values
   (1, TO_DATE('01/17/2013 08:02:44', 'MM/DD/YYYY HH24:MI:SS'), 1099, 'cr');
Insert into TEST_BANK
   (TRANS_ID, TRANS_DATE, TRANS_AMT, DEBIT_CREDIT_INDICATOR)
 Values
   (1, TO_DATE('01/18/2013 08:03:02', 'MM/DD/YYYY HH24:MI:SS'), 800, 'cr');
Insert into TEST_BANK
   (TRANS_ID, TRANS_DATE, TRANS_AMT, DEBIT_CREDIT_INDICATOR)
 Values
   (1, TO_DATE('01/19/2013 08:03:18', 'MM/DD/YYYY HH24:MI:SS'), 500, 'db');
Insert into TEST_BANK
   (TRANS_ID, TRANS_DATE, TRANS_AMT, DEBIT_CREDIT_INDICATOR)
 Values
   (1, TO_DATE('01/20/2013 08:03:36', 'MM/DD/YYYY HH24:MI:SS'), 200, 'cr');
Insert into TEST_BANK
   (TRANS_ID, TRANS_DATE, TRANS_AMT, DEBIT_CREDIT_INDICATOR)
 Values
   (2, TO_DATE('01/22/2013 08:04:01', 'MM/DD/YYYY HH24:MI:SS'), 400, 'db');
Insert into TEST_BANK
   (TRANS_ID, TRANS_DATE, TRANS_AMT, DEBIT_CREDIT_INDICATOR)
 Values
   (2, TO_DATE('01/23/2013 08:04:16', 'MM/DD/YYYY HH24:MI:SS'), 345, 'cr');
Insert into TEST_BANK
   (TRANS_ID, TRANS_DATE, TRANS_AMT, DEBIT_CREDIT_INDICATOR)
 Values
   (2, TO_DATE('01/24/2013 08:04:33', 'MM/DD/YYYY HH24:MI:SS'), 600, 'db');
COMMIT;
I need to get the highest and lowest credit / debit amount for each trans_id.
I tried the SQL query below. Could you please let me know if a better solution.
select distinct * from (
select trans_id , case when debit_credit_indicator ='db' then  max(trans_amt) over (partition by trans_id,debit_credit_indicator )
                             when  debit_credit_indicator ='cr' then  max(trans_amt) over (partition by trans_id,debit_credit_indicator )
                             else null end trans_amt , debit_credit_indicator 
 from test_bank  
 union
 select trans_id , case when debit_credit_indicator ='db' then  min(trans_amt) over (partition by trans_id,debit_credit_indicator )
                             when  debit_credit_indicator ='cr' then  min(trans_amt) over (partition by trans_id,debit_credit_indicator )
                             else null end trans_amt , debit_credit_indicator 
 from test_bank   )
 order by trans_id
Thank you

Hello

to get the answer, we need to know what is your expected results (showing an example).

I don't know if this is appropriate for your needs:

  SELECT trans_id, debit_credit_indicator, MAX (trans_amt) trans_amt, 'MAX' min_max
    FROM test_bank
GROUP BY trans_id, debit_credit_indicator
UNION ALL
  SELECT trans_id, debit_credit_indicator, MIN (trans_amt)trans_amt, 'MIN' min_max
    FROM test_bank
GROUP BY trans_id, debit_credit_indicator
ORDER BY trans_id, debit_credit_indicator, min_max DESC;

  TRANS_ID DEBIT_CREDIT_INDICATOR  TRANS_AMT MIN_MAX
---------- ---------------------- ---------- -------
         1 cr                            200 MIN
         1 cr                           1099 MAX
         1 db                            500 MIN
         1 db                            500 MAX
         2 cr                            345 MIN
         2 cr                            345 MAX
         2 db                            400 MIN
         2 db                            600 MAX

Kind regards.
Al

Tags: Database

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