Query that display all dates in a range - sql

Question

I want to create a query that displays dates and counts. I want to display all dates within a range including dates with zero counts. I am looking for a way to do this WITHOUT using temp tables.
The output might look like:
Time Count
1/1/2017 01:00 AM 23
1/1/2017 02:00 AM 0
1/1/2017 03:00 AM 0
1/1/2017 04:00 AM 12

Answer 1

I was able to come up with an solutions that adds zero count rows. An example of the result set is below. You will see there are some duplicate DayOfWeekByHour values. I will need to figure out how to sum those up, but this is basically what I was looking for. See Example code link
DayOfWeekByHour, Count
100, 0
101, 0
102, 0
100, 23
201, 100
example of code
SELECT
TO_NUMBER(MOD(V,7)+1 || LPAD(MOD(V,24),2,'0')) as DayOfWeekByHour, 0
FROM (
SELECT 1 V FROM DUAL
) T
MODEL DIMENSION BY (ROWNUM R)
MEASURES (V)
RULES ITERATE (168) (
V[ITERATION_NUMBER] = CV(R) + 1
)
UNION
SELECT
TO_NUMBER(
TO_CHAR(
TO_DATE(
EXTRACT(MONTH FROM ve.CREATED_TIMESTAMP) || '/' ||
EXTRACT(DAY FROM ve.CREATED_TIMESTAMP) || '/' ||
EXTRACT(YEAR FROM ve.CREATED_TIMESTAMP) ,'MM/DD/YYYY'),'D'),'99') * 100 + TO_NUMBER(TO_CHAR(TO_DATE(
EXTRACT(MONTH FROM ve.CREATED_TIMESTAMP) || '/' ||
EXTRACT(DAY FROM ve.CREATED_TIMESTAMP) || '/' ||
EXTRACT(YEAR FROM ve.CREATED_TIMESTAMP) || ' ' ||
EXTRACT(HOUR FROM ve.CREATED_TIMESTAMP) || ':' ||
EXTRACT(MINUTE FROM ve.CREATED_TIMESTAMP)
,'MM/DD/YYYY HH24:MI'
)
,'HH24'
)
, '99') AS DayOfWeekByHour,
COUNT(*)
FROM
VIEWER.VIEWING_EVENT ve
WHERE
ve.CREATED_TIMESTAMP >= TO_TIMESTAMP('02-12-2016 00:00:00', 'dd-mm-yyyy hh24:mi:ss') AND
ve.CREATED_TIMESTAMP <= TO_TIMESTAMP('02-12-2017 00:00:00', 'dd-mm-yyyy hh24:mi:ss')
GROUP BY
TO_NUMBER(
TO_CHAR(
TO_DATE(
EXTRACT(MONTH FROM ve.CREATED_TIMESTAMP) || '/' ||
EXTRACT(DAY FROM ve.CREATED_TIMESTAMP) || '/' ||
EXTRACT(YEAR FROM ve.CREATED_TIMESTAMP) ,'MM/DD/YYYY'),'D'),'99') * 100 + TO_NUMBER(TO_CHAR(TO_DATE(
EXTRACT(MONTH FROM ve.CREATED_TIMESTAMP) || '/' ||
EXTRACT(DAY FROM ve.CREATED_TIMESTAMP) || '/' ||
EXTRACT(YEAR FROM ve.CREATED_TIMESTAMP) || ' ' ||
EXTRACT(HOUR FROM ve.CREATED_TIMESTAMP) || ':' ||
EXTRACT(MINUTE FROM ve.CREATED_TIMESTAMP)
,'MM/DD/YYYY HH24:MI'
)
,'HH24'
)
, '99')
ORDER BY
DayOfWeekByHour
;