SQL Query to pull date range based on dates in a table - sql

Question

I have some SQL code which is contained in an SSRS report and when run pulls a list of student detentions for a set period such as a week or month but I have been asked to get the report to run automatically from the start of the current school term to the date the report has been run. Is this possible? We have 3 terms per year and the dates change each year. The report has multiple subscriptions which will run weekly and filter to students in particular day houses and years so we ideally need the report to update itself.
We have a table in our database titled TblSchoolManagementTermDates which includes txtStartDate and txtFinishDate columns for each term.
The date of the detention is stored in the column detPpl.dDetentionDate
The full SQL code I am currently using is:
SELECT ppl.txtSchoolID AS SchoolID,
detPpl.TblDisciplineManagerDetentionsPupilsID AS DetentionID,
ppl.txtSurname AS Surname,
ppl.txtForename AS Forename,
ppl.txtPrename AS PreferredName,
ppl.intNCYear AS Year,
ppl.txtAcademicHouse AS House,
schTermDates.intSchoolYear AS AcademicYear,
schTerms.txtName AS TermName,
CAST(schTermDates.intSchoolYear AS CHAR(4)) + '/' +
RIGHT(CAST(schTermDates.intSchoolYear + 1 AS CHAR(4)), 2) AS AcademicYearName,
detPpl.dDetentionDate AS DetentionDate,
detSessions.txtSessionName AS DetentionName,
detPpl.txtOffenceDescription AS OffenceDescription,
LEFT(Staff.Firstname, 1) + '. ' + Staff.Surname AS PutInBy,
detPpl.intPresent AS AttendedDetention
FROM dbo.TblPupilManagementPupils AS ppl
INNER JOIN
dbo.TblDisciplineManagerDetentionsPupils AS detPpl
ON detPpl.txtSchoolID = ppl.txtSchoolID
INNER JOIN
dbo.TblDisciplineManagerDetentionsSessions AS detSessions
ON detPpl.intDetentionSessionID = detSessions.TblDisciplineManagerDetentionsSessionsID
INNER JOIN
dbo.TblStaff AS Staff
ON Staff.User_Code = detPpl.txtSubmittedBy
INNER JOIN
dbo.TblSchoolManagementTermDates AS schTermDates
ON detPpl.dDetentionDate BETWEEN schTermDates.txtStartDate AND schTermDates.txtFinishDate
INNER JOIN
dbo.TblSchoolManagementTermNames AS schTerms
ON schTermDates.intTerm = schTerms.TblSchoolManagementTermNamesID
LEFT OUTER JOIN
dbo.TblDisciplineManagerDetentionsCancellations AS Cancelled
ON Cancelled.intSessionID = detPpl.intDetentionSessionID
AND Cancelled.dDetDate = detPpl.dDetentionDate
WHERE (ppl.txtAcademicHouse = 'Challoner') AND (Cancelled.TblDisciplineManagerDetentionsCancellationsID IS NULL) AND (CAST(detPpl.dDetentionDate AS DATE) >= CAST (GETDATE()-28 AS DATE))
ORDER BY ppl.txtSurname, ppl.txtForename, detPpl.dDetentionDate

Answer 1

What you need is to assign a couple of parameters to this code.
lets call the parameters
#term_start
and
#term_end
In your where clause you simply need to remove this piece
AND (CAST(detPpl.dDetentionDate AS DATE) >= CAST (GETDATE()-28 AS DATE))
and add this piece in
AND (CAST(detPpl.dDetentionDate AS DATE) between #term_start and #term_end
Now create another dataset based on your term dates - lets call the dataset term_dates
something like this (I'm making up these fields as I don't know what columns are available or have no sample data) Use the idea below to adapt to your requirements
select
min(term_start_date) as start_date
,max(term_end_date) as end_date
from TblSchoolManagementTermNames
where convert(date,getdate()) between term_start_date and term_end_date
Now your report should have 2 parameters.. You simply need to set the default value for the parameters.
Set the default value for #term_start as the start_date and #term_end as the end_date from your term_dates dataset
Run your report.. You should have the data between the term dates.
This should work.. unless I've misunderstood the requirement