How to use results from first select to run from second select w/subselect?

Question

-- I create a table with three fields: Name, Amount, and a Trans_Date.
CREATE TABLE TEST
NAME VARCHAR2(19) NULL,
AMOUNT VARCHAR2(8) NULL,
TRANS_DATE DATE NULL
-- I insert a few rows into my table:
INSERT INTO TEST ( TEST.NAME, TEST.AMOUNT, TEST.TRANS_DATE ) VALUES ( 'Bill', '110', TO_DATE('06/01/2005 08:00:00 PM', 'MM/DD/YYYY HH12:MI:SS PM') );
INSERT INTO TEST ( TEST.NAME, TEST.AMOUNT, TEST.TRANS_DATE ) VALUES ( 'Bill', '20', TO_DATE('06/02/2005 08:00:00 PM', 'MM/DD/YYYY HH12:MI:SS PM') );
INSERT INTO TEST ( TEST.NAME, TEST.AMOUNT, TEST.TRANS_DATE ) VALUES ( 'Bill', '110', TO_DATE('06/03/2005 08:00:00 PM', 'MM/DD/YYYY HH12:MI:SS PM') );
INSERT INTO TEST ( TEST.NAME, TEST.AMOUNT, TEST.TRANS_DATE ) VALUES ( 'Bill', '21', TO_DATE('06/04/2005 08:00:00 PM', 'MM/DD/YYYY HH12:MI:SS PM') );
INSERT INTO TEST ( TEST.NAME, TEST.AMOUNT, TEST.TRANS_DATE ) VALUES ( 'Bill', '68', TO_DATE('06/04/2005 08:00:00 PM', 'MM/DD/YYYY HH12:MI:SS PM') );
INSERT INTO TEST ( TEST.NAME, TEST.AMOUNT, TEST.TRANS_DATE ) VALUES ( 'Bill', '110', TO_DATE('06/05/2005 08:00:00 PM', 'MM/DD/YYYY HH12:MI:SS PM') );
INSERT INTO TEST ( TEST.NAME, TEST.AMOUNT, TEST.TRANS_DATE ) VALUES ( 'Bill', '20', TO_DATE('06/06/2005 08:00:00 PM', 'MM/DD/YYYY HH12:MI:SS PM') );
INSERT INTO TEST ( TEST.NAME, TEST.AMOUNT, TEST.TRANS_DATE ) VALUES ( 'Bill', '43', TO_DATE('06/07/2005 08:00:00 PM', 'MM/DD/YYYY HH12:MI:SS PM') );
INSERT INTO TEST ( TEST.NAME, TEST.AMOUNT, TEST.TRANS_DATE ) VALUES ( 'Bill', '77', TO_DATE('06/08/2005 08:00:00 PM', 'MM/DD/YYYY HH12:MI:SS PM') );
INSERT INTO TEST ( TEST.NAME, TEST.AMOUNT, TEST.TRANS_DATE ) VALUES ( 'Bill', '221', TO_DATE('06/09/2005 08:00:00 PM', 'MM/DD/YYYY HH12:MI:SS PM') );
INSERT INTO TEST ( TEST.NAME, TEST.AMOUNT, TEST.TRANS_DATE ) VALUES ( 'Bill', '43', TO_DATE('06/10/2005 08:00:00 PM', 'MM/DD/YYYY HH12:MI:SS PM') );
INSERT INTO TEST ( TEST.NAME, TEST.AMOUNT, TEST.TRANS_DATE ) VALUES ( 'Bill', '73', TO_DATE('06/10/2005 08:00:00 PM', 'MM/DD/YYYY HH12:MI:SS PM') );
commit;
-- These are the current select statements I am using:
-- Last 10 days
SELECT SUM(t.AMOUNT) AMOUNT10, NULL AMOUNT5, NULL AMOUNT3
FROM test t
WHERE t.NAME = 'Bill'
AND t.TRANS_DATE >= TO_DATE('06/01/2005 08:00:00 PM','mm/dd/yyyy hh12:mi:ss am')
AND t.TRANS_DATE <= TO_DATE('06/10/2005 08:00:00 PM','mm/dd/yyyy hh12:mi:ss am')
UNION ALL
-- Last 5 days
SELECT NULL AMOUNT10, SUM(t.AMOUNT) AMOUNT5, NULL AMOUNT3
FROM test t
WHERE t.NAME = 'Bill'
AND t.TRANS_DATE >= TO_DATE('06/06/2005 08:00:00 PM','mm/dd/yyyy hh12:mi:ss am')
AND t.TRANS_DATE <= TO_DATE('06/10/2005 08:00:00 PM','mm/dd/yyyy hh12:mi:ss am')
UNION ALL
-- Last 3 days
SELECT NULL AMOUNT10, NULL AMOUNT5, SUM(t.AMOUNT) AMOUNT3
FROM test t
WHERE t.NAME = 'Bill'
AND t.TRANS_DATE >= TO_DATE('06/08/2005 08:00:00 PM','mm/dd/yyyy hh12:mi:ss am')
AND t.TRANS_DATE <= TO_DATE('06/10/2005 08:00:00 PM','mm/dd/yyyy hh12:mi:ss am');
-- This is the current output:
AMOUNT10 AMOUNT5 AMOUNT3
916 NULL NULL
NULL 477 NULL
NULL NULL 414
Is there a way to combine these statements to speed up performance?
I'm thinking there should be a way to select all the rows in the last tens days, and then just from those results, run another select to get the results for the last 2, 3, or 5 days using subselects in some way. Any help is appreciated. Thanks.
I don't mind getting results in one row like this:
AMOUNT10 AMOUNT5 AMOUNT3
916 477 414

Answer 1

Thank you for providing create table and insert scripts, along with the query so far. It makes providing an answer so much easier.
Does this help?
SQL> select sum(amount10) amount10, sum(amount5) amount5, sum(amount3) amount3
  2  from
  3      (
  4      select
  5          case when
  6              t.TRANS_DATE >= TO_DATE('06/01/2005 08:00:00 PM','mm/dd/yyyy hh12:mi:ss am')
  7              AND t.TRANS_DATE <= TO_DATE('06/10/2005 08:00:00 PM','mm/dd/yyyy hh12:mi:ss am')
  8          then
  9              amount
10          end amount10,
11          case when
12              t.TRANS_DATE >= TO_DATE('06/06/2005 08:00:00 PM','mm/dd/yyyy hh12:mi:ss am')
13              AND t.TRANS_DATE <= TO_DATE('06/10/2005 08:00:00 PM','mm/dd/yyyy hh12:mi:ss am')
14          then
15              amount
16          end amount5,
17          case when
18              t.TRANS_DATE >= TO_DATE('06/08/2005 08:00:00 PM','mm/dd/yyyy hh12:mi:ss am')
19              AND t.TRANS_DATE <= TO_DATE('06/10/2005 08:00:00 PM','mm/dd/yyyy hh12:mi:ss am')
20          then
21              amount
22          end amount3
23      from
24          test t
25      where
26          t.name = 'Bill'
27      AND t.TRANS_DATE >= TO_DATE('06/01/2005 08:00:00 PM','mm/dd/yyyy hh12:mi:ss am')
28      AND t.TRANS_DATE <= TO_DATE('06/10/2005 08:00:00 PM','mm/dd/yyyy hh12:mi:ss am')
29      );
  AMOUNT10    AMOUNT5    AMOUNT3
       916        477        414
SQL>Message was edited by:
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