Complex Grouping in Sql with two or three Group criteria for single table and Joins - sql-server

Question

This is my table in ms-sql 2008
Id ReceiptNo StudId Year SchoolId ClassId FeeId Paid Balance
18 1 22 1 4 1 8 50 100
19 1 22 1 4 1 9 100 2300
20 2 23 1 5 1 9 200 2200
21 2 23 1 5 1 10 100 900
22 3 22 1 4 1 8 100 0
23 3 22 1 4 1 9 100 2200
I want rows where Balance is minimum but not 0, of that specific StudId and FeeId. Actually I want to show pending Fees to User, meaning, this Student has this much balance remaining of this fee type for this Academic Year. If you observe row with Id 18 has StudId 22 and FeeId 8 and Balance 100, now row with Id 22 shows Balance 0 with same student and same fee, meaning this 22 student has paid all fees of 8 FeeId, so I don’t want this student for FeeId 8. Now the same student has paid fee with FeeId 9, row with Id 19 & 23 and has two Balance 2300 and 2200, so I want to show that StudId 22 has Balance of 2200 remaining for FeeId 9, meaning I want to show row with Id 23 and NOT the row with Id 19. Now this applies to all students for whatever Fee Id they have.
I have tried this but not getting
SELECT StudentId,FeeTypeId,MIN(FeesBalance)
FROM FeesCollectionRS
WHERE FeesBalance !=0 GROUP BY StudentId,FeeTypeId
Actually in reality my query will be some what like this
SELECT f.StudentId,f.AcademicYear,f.SchoolId,f.MstClassId,f.FeeTypeId,d.PrnNo ,dbo.GetStudNameByStudid(f.StudentId) student,
CAST(year(a.StartOfYear)as CHAR(4))+'-'+ CAST(year(a.EndOfYear)as CHAR(4)) [Academic Year],c.Name,m.FeeType,f.FeesBalance
FROM
FeesCollectionRS f JOIN AcademicYearMasterRS a
ON f.AcademicYear = a.Id JOIN ClassMasterRS c
ON f.MstClassId = c.MstClassId JOIN MstFeeType m
ON f.FeeTypeId = m.FeeTypeId JOIN MstStudentRS d
ON d.StudentId = f.StudentId
WHERE
f.AcademicYear =1 and f.FeesBalance !=0

Answer 1

Use a HAVING clause to filter out minimums that are zero:
SELECT StudentId, FeeTypeId, MIN(FeesBalance) MinFeesBalance
FROM FeesCollectionRS
GROUP BY StudentId, FeeTypeId
HAVING MIN(FeesBalance) > 0
This first groups to find the minimum, then returns only those groups that have the criteria in HAVING, which is like a WHERE equivalent for groups and is applied to the result of aggregations rather than column values.

Answer 2

How about this:
SQL Fiddle
MS SQL Server 2008 Schema Setup:
CREATE TABLE StudentFees
(
Id INT PRIMARY KEY,
ReceiptNo INT,
StudId INT,
[Year] SMALLINT,
SchoolId INT,
ClassId INT,
FeeId INT,
Paid INT,
Balance INT
)
INSERT INTO StudentFees
VALUES (18, 1, 22, 1, 4, 1, 8, 50, 100),
(19, 1, 22, 1, 4, 1, 9, 100, 2300),
(20, 2, 23, 1, 5, 1, 9, 200, 2200),
(21, 2, 23, 1, 5, 1, 10, 100, 900),
(22, 3, 22, 1, 4, 1, 8, 100, 0),
(23, 3, 22, 1, 4, 1, 9, 100, 2200)
Query 1:
;WITH CTE
AS
(
SELECT StudId, FeeId, [Year], MAX(Id) As MaxId
FROM StudentFees
GROUP BY StudId, FeeId, [Year]
)
SELECT SF.StudId, SF.[Year],
SF.SchoolId, SF.ClassId, SF.FeeId, SF.Balance
FROM StudentFees SF
INNER JOIN CTE
ON CTE.MaxId = SF.Id
WHERE SF.Balance > 0
Results:
| StudId | Year | SchoolId | ClassId | FeeId | Balance |
|--------|------|----------|---------|-------|---------|
| 22 | 1 | 4 | 1 | 9 | 2200 |
| 23 | 1 | 5 | 1 | 9 | 2200 |
| 23 | 1 | 5 | 1 | 10 | 900 |