You don't need to create another table to get only Depatment names. You can simle
SELECT[
^] these values using query:
SELECT DepName
FROM YourTable
ORDER BY DepName
But if really want to create new table, please, refer below links:
CREATE TABLE[
^]
INSERT statement (T-SQL)[
^]
INSERT INTO NewTable (DepName)
SELECT DepName
FROM YourTable
ORDER BY DepName