need sql query for the below senario

table contains : c1 c2 c3 c4 c5 da1 Null Null db1 dc1 da1 dx1 Null db1 dc1 da1 Null dy1 db1 Null all are varchar fields. i need a query which results data without any nulls and in a single row "da1 dx1 dy1 db1 dc1" thanks in advance for the help !!