Joining two columns on a table in SQL

I have a problem that is quite simple to understand, but for me it is not that simple to implement. I have a table named Time: ``` ----------------------------------- DAY TIME1 TIME2 ----------------------------------- 1 08.00 09.40 1 09.40 10.00 1 10.00 11.40 2 08.00 08.50 2 08.50 10.40 ---------------------------------- ``` What I want to get is like: ``` ------------------- DAY TIME ------------------- 1 08.00 1 09.40 1 10.00 1 11.00 2 08.00 2 08.50 2 10.40 ------------------ ``` I have tried this code: ``` SELECT DISTINCT sub.val FROM ( SELECT Time1 AS val FROM Time UNION ALL SELECT Time2 AS val FROM Time ) AS sub ``` And it is only return the Time column. I have no idea about joining the "Day" column. While I am trying to add the "Day" after the "DISTINCT sub.val", it got error. How to do it? Thank you very much.