CREATE TABLE table_name_25 (year_completed INT, dam_type VARCHAR, dam_constructed VARCHAR)

Which Year completed has a Dam type of earthfill embankment, and a Dam constructed of khancoban dam?
SELECT MAX(year_completed) FROM table_name_25 WHERE dam_type = "earthfill embankment" AND dam_constructed = "khancoban dam"
SELECT MAX("year_completed") FROM "table_name_25" WHERE "dam_constructed" = "khancoban dam" AND "dam_type" = "earthfill embankment"