Retrieve the first result for each field on sql table

Question

I have a sql table like this:

code	label
1	row
1	row2
2	row3
2	row4
2	row5

I want to retrieve the first description for each 'code' For ex:

code	label
1	row
2	row3

How can be the SQL query?

Answer 1

There is an ability to enumerated rows within each code with order by label .

/*
WITH MYTABLE (code, label) AS
(
VALUES
  (1, 'row')
, (1, 'row2')
, (2, 'row3')
, (2, 'row4')
, (2, 'row5')
)
*/
SELECT CODE, LABEL
FROM
(
  SELECT ROW_NUMBER () OVER (PARTITION BY CODE ORDER BY LABEL) AS RN_
, T.*
FROM MYTABLE T  
) 
WHERE RN_ = 1

CODE	LABEL
1	row
2	row3