CREATE TABLE table_204_824 (id DECIMAL, "no." DECIMAL, "train no:" TEXT, "origin" TEXT, "destination" TEXT, "train name" TEXT)

how many trains originate from mangalore central ?
SELECT COUNT(*) FROM table_204_824 WHERE "origin" = 'mangalore central'
SELECT COUNT(*) FROM "table_204_824" WHERE "origin" = 'mangalore central'