SQL Select multiple rows with same column values

Question

I have table:

 column1 column2 column3 column4 --------------------------------------------- 1 53 6527 111 2 53 6527 111 3 53 6527 111 4 53 6527 111 5 53 6527 222 6 53 6527 222 7 53 6527 333 8 53 6527 333 9 53 6527 444 10 53 6527 444 11 53 6527 444 12 53 6527 444 

I need select if exists three rows with some column4 value if exists just two then two or one. Max is three. After select i need get result like this:

 column1 column2 column3 column4 --------------------------------------------- 1 53 6527 111 2 53 6527 111 3 53 6527 111 5 53 6527 222 6 53 6527 222 7 53 6527 333 8 53 6527 333 9 53 6527 444 10 53 6527 444 11 53 6527 444 

Answer 1

Since you are using SQL Server you can use ranking function s to get the result:

select [column1], [column2], [column3], [column4]
from
(
  select [column1], [column2], [column3], [column4],
    row_number() over(partition by column2, column3, column4 order by column1) rn
  from yourtable
) src
where rn <= 3

See SQL Fiddle with Demo