Select Rows that appear more than once

Question

   TableOne

      PersonId        PersonScore
         1                10
         1                20
         2                99
         2                40
         3                45

I need to fetch only those rows where PersonId appears More than Once e.g. Following is the resultset i want to achieve

     PersonId        PersonScore
         1                10
         1                20
         2                99
         2                40

i am using cte

  ;WITH cte AS (
   SELECT  *, ROW_NUMBER() OVER (PARTITION BY i.PersonId ORDER BY i.PersonId) AS [Num]
   FROM    TableOne i
   )
   SELECT  *
   FROM    cte
   WHERE   cte.Num > 1

The problem is it removes the extra rows. It romoves the first instance of any PersonId. Can anyone suggest a solution please

Answer 1

You want to use count(*) as a window function, rather than row_number():

select t.PersonId, t.PersonScore
from (select t.*, count(*) over (partition by PersonId) as cnt
      from TableOne t
     ) t
where cnt > 1;