Calculate running total

Question

I want to calculate the running total on a bank account with each transaction.
Below is sample data script.
CREATE TABLE ACCT (trans_type varchar2(100), trans_date date, trans_loc varchar2(250), trans_amt number);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('11/19/2010', 'MM/DD/YYYY'), 'WAL-MART', 2.62);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('RETURN', TO_DATE('12/27/2010', 'MM/DD/YYYY'), 'JCPENNEY STORE', -32.27);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('11/28/2010', 'MM/DD/YYYY'), 'WAL-MART', 23.91);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('01/02/2011', 'MM/DD/YYYY'), 'TOMMY HILFIGER', 16.1);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('02/27/2011', 'MM/DD/YYYY'), 'DILLARD''S', 64.31);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('01/07/2011', 'MM/DD/YYYY'), 'MIKE KEHOE', 23.26);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('01/02/2011', 'MM/DD/YYYY'), 'OLIVE CAFE', 25.04);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('12/10/2010', 'MM/DD/YYYY'), 'WAL-MART', 46.13);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('12/07/2010', 'MM/DD/YYYY'), 'WAL-MART', 3.82);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('12/01/2010', 'MM/DD/YYYY'), 'TARGET', 12.09);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('02/22/2011', 'MM/DD/YYYY'), 'TARGET', 43.1);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('01/26/2011', 'MM/DD/YYYY'), 'ST MARYS BIL', 6.96);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('02/14/2011', 'MM/DD/YYYY'), 'WALLMART', 56.9);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('02/27/2011', 'MM/DD/YYYY'), 'WALLMART', 43.64);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('01/16/2011', 'MM/DD/YYYY'), 'OLIVE CAFE', 18.14);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('SALE', TO_DATE('12/23/2010', 'MM/DD/YYYY'), 'MIDEAST BALLWIN', 103.18);
Insert into ACCT (TRANS_TYPE, TRANS_DATE, TRANS_LOC, TRANS_AMT)
Values ('RETURN', TO_DATE('12/27/2010', 'MM/DD/YYYY'), 'JCPENNEY STORE', -34.75);I need running total to show with each transaction and also the balance amount out of a static limit of 7500.
Any help is appreciated!

Answer 1

Thanks for providing sample data!
Are you looking for something like this?
SQL > SELECT trans_type
  2       , trans_date
  3       , trans_loc
  4       , trans_amt
  5       , 7500 - SUM(trans_amt) OVER (ORDER BY rn) AS running_balance
  6       , SUM(trans_amt) OVER (ORDER BY rn)        AS running_total
  7  FROM   (
  8                  SELECT trans_type
  9                       , trans_date
10                       , trans_loc
11                       , trans_amt
12                       , ROW_NUMBER() OVER (ORDER BY trans_date) AS rn
13                  FROM   acct
14         )
15  ORDER BY 2
16  ;
TRANS_TYPE      TRANS_DATE          TRANS_LOC                            TRANS_AMT      RUNNING_BALANCE        RUNNING_TOTAL
SALE            11/19/2010 00:00:00 WAL-MART                                  2.62              7497.38                 2.62
SALE            11/28/2010 00:00:00 WAL-MART                                 23.91              7473.47                26.53
SALE            12/01/2010 00:00:00 TARGET                                   12.09              7461.38                38.62
SALE            12/07/2010 00:00:00 WAL-MART                                  3.82              7457.56                42.44
SALE            12/10/2010 00:00:00 WAL-MART                                 46.13              7411.43                88.57
SALE            12/23/2010 00:00:00 MIDEAST BALLWIN                         103.18              7308.25               191.75
RETURN          12/27/2010 00:00:00 JCPENNEY STORE                          -34.75                 7343                  157
RETURN          12/27/2010 00:00:00 JCPENNEY STORE                          -32.27              7375.27               124.73
SALE            01/02/2011 00:00:00 OLIVE CAFE                               25.04              7350.23               149.77
SALE            01/02/2011 00:00:00 TOMMY HILFIGER                            16.1              7334.13               165.87
SALE            01/07/2011 00:00:00 MIKE KEHOE                               23.26              7310.87               189.13
SALE            01/16/2011 00:00:00 OLIVE CAFE                               18.14              7292.73               207.27
SALE            01/26/2011 00:00:00 ST MARYS BIL                              6.96              7285.77               214.23
SALE            02/14/2011 00:00:00 WALLMART                                  56.9              7228.87               271.13
SALE            02/22/2011 00:00:00 TARGET                                    43.1              7185.77               314.23
SALE            02/27/2011 00:00:00 WALLMART                                 43.64              7142.13               357.87
SALE            02/27/2011 00:00:00 DILLARD'S                                64.31              7077.82               422.18
17 rows selected.