CREATE TABLE table_17168 ("Player" TEXT, "No. ( s ) " FLOAT, "Height in Ft." TEXT, "Position" TEXT, "Years for Rockets" TEXT, "School/Club Team/Country" TEXT)

What are all the positions for the rockets in 2008?
SELECT "Position" FROM table_17168 WHERE "Years for Rockets" = '2008'
SELECT "Position" FROM "table_17168" WHERE "Years for Rockets" = '2008'