Two counts in three tables - sql

Question

I am trying to count two columns using the following query:
select distinct [District],
count (Distinct [Student Identifier Statewide California])
as '11-12 Enrollment',
(select count (Distinct IncdtKey)
From [dbo].[DisciplineStudentFile1112]
where GrdLvLKey in ('15', '01', '02', '03', '04',
'05', '06', '07', '08', '09',
'10', '11', '12', '18', '19')) as Total_Incidents
From
dbo.SSID1112StudentEnrollmentRecords with (nolock)
inner join
[dbo].[SchoolDetail] on CDSCode = dbo.SSID1112StudentEnrollmentRecords.CDSOrig
where
[EnrollStatCodeOrig] like '10'
and
[Grade Level Code] in ('PS', 'KN', '01', '02', '03',
'04', '05', '06', '07', '08',
'09', '10', '11', '12', 'UE', 'US')
group by [District]
order by [District]
My results are:
District 11-12 Enrollment Total_Incidents
AB Unified 20662 896371
CE Unified 5387 896371
DR Unified 526 896371
FJ Unified 1506 896371
KT Unified 8415 896371
I can't figure out how to get the individual counts in the Total_Incidents column instead of a total 896371 count?

Answer 1

An easy approach is to correlate the subquery with the outer query:
select distinct SD.District,
count ( distinct SER.[Student Identifier Statewide California] ) as [11-12 Enrollment],
( select count( distinct DSF.IncdtKey ) from dbo.DisciplineStudentFile1112 as DSF
where DSF.GrdLvLKey in ( '15', '01', '02', '03', '04', '05', '06', '07', '08', '09',
'10', '11', '12', '18', '19' ) and -- Note additional condition here.
DSF.District = SD.District ) as Total_Incidents
from dbo.SSID1112StudentEnrollmentRecords as SER with (nolock) inner join
dbo.SchoolDetail as SD on SD.CDSCode = SER.CDSOrig
where SER.EnrollStatCodeOrig like '10' and
[Grade Level Code] in ( 'PS', 'KN', '01', '02', '03', '04', '05', '06', '07', '08',
'09', '10', '11', '12', 'UE', 'US' )
group by SD.District
order by SD.District
I have made some assumptions about the table schemas. I would recommend that when using joins that you supply an alias for each table and use the alias on every reference to avoid confusion.
An alternative solution would be to use another join with DisciplineStudentFile1112 and then summarize the results using GROUP BY.