CREATE TABLE table_46428 ("Finished" FLOAT, "Time/ Behind" TEXT, "Post" FLOAT, "Horse" TEXT, "Jockey" TEXT, "Trainer" TEXT, "Owner" TEXT)

What is Jockey, when Post is 12?
SELECT "Jockey" FROM table_46428 WHERE "Post" = '12'
SELECT "Jockey" FROM "table_46428" WHERE "Post" = '12'