Adding a date range to existing query - date-range

Question

I have just started a new job and am working with existing queries. As I am no expert on SQL I'm wondering if a date range such as 2015-8-1 through 2015-8-31 can be inserted into the query below. Any help offered is greatly appreciated.
SELECT
RANK() OVER (PARTITION BY DoctorFacility.ListName ORDER BY ApptSlot.Start)
as SlotNumber
, DoctorFacility.ListName as ProviderName
, ApptSlot.Start as ApptStartTime
, AppointmentsAlloc.Type as ApptType
INTO #TEMP
FROM CentricityPS.dbo.ApptSlot ApptSlot
INNER JOIN CentricityPS.dbo.AppointmentsAlloc AppointmentsAlloc
ON ApptSlot.ApptSlotId=AppointmentsAlloc.ApptSlotId
INNER JOIN CentricityPS.dbo.Schedule Schedule
ON ApptSlot.ScheduleId=Schedule.ScheduleId
INNER JOIN CentricityPS.dbo.DoctorFacility DoctorFacility
ON Schedule.DoctorResourceId=DoctorFacility.DoctorFacilityId
WHERE AppointmentsAlloc.Type IN
(
'Behavioral Health - 30'
,'Behavioral Health 45'
,'Established Patient - 15'
,'Established Patient - 20'
,'Fin Counsel - 30'
,'Gyn Visit - 15'
,'Pediatric Visit - 15'
)
AND ApptSlot.ListOrder=1
AND ApptSlot.Status IS NULL
AND ApptSlot.Start>= GETDATE()
ORDER BY DoctorFacility.ListName
SELECT
ProviderName
, ApptStartTime
, ApptType
FROM #TEMP
WHERE SlotNumber = 3
ORDER BY ProviderName
DROP TABLE #TEMP

Answer 1

There are two separate select queries here. It would be done the same way for either part of the query regardless. Just add it to your WHERE statement
AND ApptSlot.Start>= 2015-8-1
AND ApptSlot.Start<= 2015-8-31
Another syntax would be
AND ApptSlot.Start between 2015-8-1 and 2015-8-31
Ideally you want to pass those begin and start dates as variables so values would not be hard coded. It might look more like this.
AND ApptSlot.Start between #StartDate and #EndDate