Question: In what Round was a defensive tackle Pick # less than 19?
SQL: SELECT COUNT("Round") FROM "2-15198842-45" WHERE "Position" = 'defensive tackle' AND "Pick #" < 19.0;

Question: What is the Pick # with an Overall of 19?
SQL: SELECT MAX("Pick #") FROM "2-15198842-45" WHERE "Overall" = 19.0;