Querying SQL table with different values in same column with same ID

Question

I have an SQL Server 2012 table with ID, First Name and Last name. The ID is unique per person but due to an error in the historical feed,

Answer 1

SELECT *
FROM myTable
WHERE ID IN (
      SELECT ID
      FROM myTable
      GROUP BY ID
      HAVING MAX(LastName) <> MIN(LastName) OR MAX(FirstName) <> MIN(FirstName) 
      )
ORDER BY ID, LASTNAME

Answer 2

SELECT
    ID
FROM
    <<Table>>
GROUP BY
    ID
HAVING
    COUNT(*) > 1;