T-SQL results per day for 1 year between time range - sql-server

Question

I need to return count on results per day between a time range that will overlap days.
So from 8 PM to 8 AM for every day that starts on M-F return a count for that time period. And do that for the entire year.
This is what I have, and I could do a simple and between if I only wanted on day but I'm not sure how to iterate through days especially when the start is on one day and the end on the next but skip the ones that Start on a Saturday or Sunday.
SELECT TOP (50)
ClientVisit.visittype,
ClientVisit.location_id,
ClientVisit.visittype_id,
Location.location_desc,
Location.location_code,
ClientVisit.timein,
ClientVisit.timeout,
ClientVisit.visit_dateday
FROM
ClientVisit
INNER JOIN
Location ON ClientVisit.location_id = Location.location_id
WHERE
(ClientVisit.visittype Like '%Open Chart%'
OR ClientVisit.visittype LIKE '%Diag%')
AND (Location.location_code = 'Access-505'
OR Location.location_code = 'Access-hosp')
AND (ClientVisit.timein BETWEEN #param1 AND #param2)

Answer 1

Filtering days of week and hours of the day is easy enough. Does this group by get at what you're trying to accomplish for the counts?
SELECT CAST(ClientVisit.timein AS DATE) AS DT, COUNT(*)
FROM ClientVisit INNER JOIN Location
ON ClientVisit.location_id = Location.location_id
WHERE
(ClientVisit.visittype Like '%Open Chart%' OR ClientVisit.visittype LIKE '%Diag%')
AND (Location.location_code = 'Access-505' OR Location.location_code = 'Access-hosp')
-- Use date params rather than datetime
AND CAST(ClientVisit.timein AS DATE) BETWEEN #param1 AND #param2
-- M-F assuming ##DATEFIRST is Sunday (7)
AND DATEPART(weekday, ClientVisit.timein) BETWEEN 2 AND 6
-- time of day. won't include the instant of 8:00:00am
AND ( DATEPART(hour, ClientVisit.timein) BETWEEN 8 AND 23
OR DATEPART(hour, ClientVisit.timein) BETWEEN 0 AND 7)
GROUP BY CAST(ClientVisit.timein AS DATE);
If you need to treat the hours from 8PM to 8AM as a single shift then you can adjust the times prior to so that times after midnight are treated as part of the preceeding day:
WITH AdjustedVisit AS (
SELECT *, DATEADD(hour, -8, timein) AS adjustedin FROM ClientVisit)
-- Use date params rather than datetime
WHERE CAST(timein AS DATE) BETWEEN #param1 AND #param2
)
SELECT CAST(v.adjustedin AS DATE) AS DT, COUNT(*)
FROM AdjustedVisit AS v INNER JOIN Location AS l
ON v.location_id = l.location_id
WHERE
(v.visittype Like '%Open Chart%' OR v.visittype LIKE '%Diag%')
AND (l.location_code = 'Access-505' OR l.location_code = 'Access-hosp')
-- M-F assuming ##DATEFIRST is Sunday (7)
AND DATEPART(weekday, v.adjustedin) BETWEEN 2 AND 6
-- time of day. won't include the instant of 8:00:00am
AND DATEPART(hour, v.adjustedin) BETWEEN 12 AND 23
GROUP BY CAST(v.adjustedin AS DATE);