Table: player_stats_31
Columns: year
tckl
sack
p_ko_ret
yards

Question: What is the total of TCKL in 2000 with a P/KO RET less than 14?
SQL: SELECT COUNT("tckl") FROM player_stats_31 WHERE "year" = '2000' AND "p_ko_ret" < 14

Question: What is the highest YARDS with a TCKL more than 51 and less than 2 SACK?
SQL: SELECT MAX("yards") FROM player_stats_31 WHERE "tckl" > 51 AND "sack" < 2

Question: What is the total of all YARDS with 0 SACK and less than 14 P/KO RET?
SQL: SELECT COUNT("yards") FROM player_stats_31 WHERE "sack" = 0 AND "p_ko_ret" < 14