Table: sherd_1993_stats
Columns: year
comp
att
comp_2
yards
td_s
int_s
rating

Question: What is the sum of completions that led to completion percentages of 65.4 and attempts under 451?
SQL: SELECT SUM("comp") FROM sherd_1993_stats WHERE "comp_2" = 65.4 AND "att" < 451

Question: What is the highest number of touchdowns that had yards of 574 and completions over 54?
SQL: SELECT MAX("td_s") FROM sherd_1993_stats WHERE "yards" = 574 AND "comp" > 54