How to select row with max value when duplicate rows exist in SQL Server

Question

I have table like this

DocumentID        | MasterStepID | StepNumber | RoleID | UserID     | Status
JIEP/TT/07/000174 | Approval1    |          1 |   NULL |         


        

Answer 1

The simple table (Student_Course) currently is like this with duplicate records assume:

Sname   Sid
------------
Ravi    S001
Ravi    S001
Jack    S002
Jack    S002
Jack    S002
Guru    S003
Smith   S004
Arun    S005
Rajeev  S006

Query:

SELECT S.Sid, S.Sname, Count(*) As Occurance
FROM Student_Course AS S
GROUP BY S.Sid
HAVING Count(S.Sid) > 1
Order By Count(*) Desc Limit 1

Output:

Sid     Sname   Occurance
-------------------------
S002    Jack    3