CREATE TABLE table_68181 ("Year" FLOAT, "Winner" TEXT, "Jockey" TEXT, "Trainer" TEXT, "Owner" TEXT, "Distance  ( Miles ) " TEXT, "Time" TEXT)

What jockey rode for Michael House before 2012
SELECT "Jockey" FROM table_68181 WHERE "Year" < '2012' AND "Owner" = 'michael house'
SELECT "Jockey" FROM "table_68181" WHERE "Owner" = 'michael house' AND "Year" < '2012'