SELECT a.*
FROM TableName a
INNER JOIN
(
SELECT EmpID
FROM TableName
GROUP BY EmpID
HAVING COUNT(*) > 1
) b ON a.EmpID = b.EmpID
Inny sposób, chociaż wolę powyżej , jest użycie IN
SELECT a.*
FROM TableName a
WHERE EmpId IN
(
SELECT EmpId
FROM TableName
GROUP BY EmpId
HAVING COUNT(*) > 1
)