How to get date and amount between two columns in oracle? - sql

Question

I stuck in a query and table is
TP_DEALNUM DEALDATE MATURITYDATE TP_DEALTYPE TP_NETVALUE
500 20180521 20180524 NBORR 209221500
501 20180525 20180527 NBORR 249221500
502 20180527 20180527 NBORR 747664500
601 20180530 20180531 CBORR 1000000000
602 20180530 20180531 CBORR 500000000
and my query is,
if date difference between dealdate and MATURITYDATE is =2 then I need
DEALDATE TP_NETVALUE
20180525 249221500
20180526 249221500
and if date difference between dealdate and MATURITYDATE is =3 then I need
DEALDATE TP_NETVALUE
20180521 209221500
20180522 209221500
20180523 209221500
and date difference will be increasing till 14
I tried below query,But I'm not getting output
WITH cte AS (
SELECT tp_dealnum,dealdate, maturitydate,TP_DEALTYPE,TP_NETVALUE,
(maturitydate -dealdate) AS DateDiff
FROM tablename)
SELECT case WHEN datediff=2 THEN dealdate+1
WHEN datediff=3 THEN dealdate+1 END AS dealdate_1,
tp_netvalue FROM cte
WHERE DateDiff >= 2

Answer 1

I recommend using a calendar table approach here. Maintain a record of all deal dates which would cover the gaps in your current table, and then join to it:
WITH dates AS (
SELECT date '2018-05-01' AS DEALDATE FROM dual UNION ALL
SELECT date '2018-05-02' FROM dual UNION ALL
SELECT date '2018-05-02' FROM dual UNION ALL
....
SELECT date '2018-05-30' FROM dual UNION ALL
SELECT date '2018-05-31' FROM dual
)
SELECT
d.DEALDATE,
t.TP_NETVALUE
FROM dates d
INNER JOIN tablename t
ON d.DEALDATE BETWEEN t.DEALDATE AND t.MATURITYDATE - 1
WHERE
t.MATURITYDATE - t.DEALDATE BETWEEN 2 AND 3;
Note that this just generates the missing data. If you wanted to incorporate it into some other query/logic, then you would have to do additional work.

Answer 2

The key is generating another CTE with intermittent dates like this-
WITH deal AS
(SELECT 500 TP_DEALNUM,
20180521 DEALDATE,
20180524 MATURITYDATE,
'NBORR' TP_DEALTYPE,
209221500 TP_NETVALUE
FROM dual
UNION ALL
SELECT 501, 20180525, 20180527, 'NBORR', 249221500 FROM dual
UNION ALL
SELECT 502, 20180527, 20180527, 'NBORR', 747664500 FROM dual
UNION ALL
SELECT 601, 20180530, 20180531, 'CBORR', 1000000000 FROM dual
UNION ALL
SELECT 602, 20180530, 20180531, 'CBORR', 500000000 FROM dual),
daterange AS
(SELECT min (dealdate) start_date, max (maturitydate) end_date
FROM deal),
intermittent_date AS
( SELECT start_date + level - 1 AS int_date
FROM daterange
CONNECT BY start_date + level - 1 <= end_date)
SELECT id.int_date dealdate, dl.tp_netvalue
FROM deal dl
INNER JOIN intermittent_date id
ON id.int_date BETWEEN dl.dealdate AND dl.maturitydate - 1
WHERE dl.maturitydate - dl.dealdate = 2;
Output:
DEALDATE TP_NETVALUE
---------- -----------
20180525 249221500
20180526 249221500