Want to ROUND the Data according to DAY difference - oracle

Question

Query :
select
TO_CHAR((to_date(IP_START_DATE,'DD-MM-YYYY HH24:MI:SS')+ (level-1)),'DD-MM-YYYY'),
TO_CHAR(to_date(IP_START_DATE,'DD-MM-YYYY HH24:MI:SS') + level,'DD-MM-YYYY') ,
to_number(regexp_substr(IP_PLAN_CONSUMPTION, '^\d+'))/(TO_DATE(IP_END_DATE, 'DD-MM-YYYY HH24:MI:SS') - TO_DATE(IP_START_DATE, 'DD-MM-YYYY HH24:MI:SS')) || regexp_substr(IP_PLAN_CONSUMPTION, '[A-Z]') as IP_PLAN_CONSUMPTION
FROM
dual
CONNECT BY
level <= to_date(IP_END_DATE,'DD-MM-YYYY HH24:MI:SS')-to_date(IP_START_DATE,'DD-MM-YYYY HH24:MI:SS')+1;
-> Data in Query :
select
TO_CHAR((to_date('16-07-2018 11:02','DD-MM-YYYY HH24:MI:SS')+ (level-1)),'DD-MM-YYYY'),
TO_CHAR(to_date('16-07-2018 11:02','DD-MM-YYYY HH24:MI:SS') + level,'DD-MM-YYYY'),
to_number(regexp_substr('4000 T', '^\d+'))/(TO_DATE('18-07-2018 00:00', 'DD-MM-YYYY HH24:MI:SS') - TO_DATE('16-07-2018 11:02', 'DD-MM-YYYY HH24:MI:SS')) || regexp_substr('4000 T', '[A-Z]') as IP_PLAN_CONSUMPTION
FROM
dual
CONNECT BY
level <= to_date('18-07-2018 00:00','DD-MM-YYYY HH24:MI:SS')-to_date('16-07-2018 11:02','DD-MM-YYYY HH24:MI:SS')+1;
Output will Be :
But its should be 2000 T
Not : If Start Date: 16-07-2018 00:00 & End Date : 19-07-2018 00:00 then Day Difference is 3 Days & Consumption is 4000 T then Inserted Consumption Should be 1333.333333333333 T ~ 1334 T in each date.

Answer 1

If you are storing dates, you should store them in your table as the DATE data type (and not as strings).
SQL Fiddle
Oracle 11g R2 Schema Setup:
CREATE TABLE your_table( id, ip_start_date, ip_end_date, ip_plan_consumption ) AS
SELECT 1,
DATE '2018-07-16' + INTERVAL '11:02' HOUR TO MINUTE,
DATE '2018-07-18' + INTERVAL '00:00' HOUR TO MINUTE,
'4000 T'
FROM DUAL
UNION ALL
SELECT 2,
DATE '2018-07-16' + INTERVAL '11:02' HOUR TO MINUTE,
DATE '2018-07-16' + INTERVAL '23:08' HOUR TO MINUTE,
'3000 T'
FROM DUAL
UNION ALL
SELECT 3,
DATE '2018-07-10' + INTERVAL '00:00' HOUR TO MINUTE,
DATE '2018-07-13' + INTERVAL '23:59' HOUR TO MINUTE,
'15000 U'
FROM DUAL
;
Query 1:
WITH data ( id, start_dt, end_dt, consumption, units ) AS (
SELECT id,
TRUNC( IP_START_DATE ),
GREATEST( TRUNC( IP_START_DATE ) + 1, TRUNC( IP_END_DATE ) ),
TO_NUMBER( REGEXP_SUBSTR( IP_PLAN_CONSUMPTION, '^\d+' ) ),
REGEXP_SUBSTR( IP_PLAN_CONSUMPTION, '\S+$' )
FROM your_table
)
SELECT id,
t.column_value AS start_dt,
t.column_value + 1 AS end_dt,
consumption / ( end_dt - start_dt ) || units AS IP_PLAN_CONSUMPTION
FROM data d
CROSS JOIN
TABLE(
CAST(
MULTISET(
SELECT d.start_dt + LEVEL - 1
FROM DUAL
CONNECT BY d.start_dt + LEVEL - 1 < d.end_dt
)
AS SYS.ODCIDATELIST
)
) t
Results:
| ID | START_DT | END_DT | IP_PLAN_CONSUMPTION |
|----|----------------------|----------------------|---------------------|
| 1 | 2018-07-16T00:00:00Z | 2018-07-17T00:00:00Z | 2000T |
| 1 | 2018-07-17T00:00:00Z | 2018-07-18T00:00:00Z | 2000T |
| 2 | 2018-07-16T00:00:00Z | 2018-07-17T00:00:00Z | 3000T |
| 3 | 2018-07-10T00:00:00Z | 2018-07-11T00:00:00Z | 5000U |
| 3 | 2018-07-11T00:00:00Z | 2018-07-12T00:00:00Z | 5000U |
| 3 | 2018-07-12T00:00:00Z | 2018-07-13T00:00:00Z | 5000U |