Question: What is the maximum pick when wr was the position and michigan the college, and the overall greater than 255?
SQL: SELECT MAX("Pick") FROM "2-17100961-42" WHERE "Position" = 'wr' AND "College" = 'michigan' AND "Overall" > 255.0;

Question: What is the total round when db was the position, and the pick less than 21, and jeff welch as the name?
SQL: SELECT SUM("Round") FROM "2-17100961-42" WHERE "Position" = 'db' AND "Name" = 'jeff welch' AND "Pick" < 21.0;