SQL query - Join that returns the first two records of joining table

Question

I have two tables:

Patient

• pkPatientId
• FirstName
• Surname

PatientStatus

• pk

Answer 1

Here is my attempt - It should work on SQL Server 2005 and SQL Server 2008 (Tested on SQL Server 2008) owing to the use of a common table expression:

WITH CTE AS
(
    SELECT  fkPatientId
          , StatusCode
          -- add more columns here
          , ROW_NUMBER() OVER
    (
    PARTITION BY fkPatientId ORDER BY fkPatientId desc) AS [Row_Number] 
    from PatientStatus
    where fkPatientId in
    (
        select fkPatientId
        from PatientStatus
        group by fkPatientId
        having COUNT(*) >= 2
    )
)
SELECT p.pkPatientId,
    p.FirstName,
    CTE.StatusCode  
FROM [Patient] as p
    INNER JOIN CTE
        ON p.[pkPatientId] = CTE.fkPatientId
WHERE CTE.[Row_Number] = 1 
or CTE.[Row_Number] = 2