Table: mma_fights_21
Columns: res
record
opponent
method
event
round
time
location

Question: what is the record when the opponent is jeff williams?
SQL: SELECT "record" FROM mma_fights_21 WHERE "opponent" = 'jeff williams'

Question: what is the method for round 1 and the opponent is bobby mcmaster?
SQL: SELECT "method" FROM mma_fights_21 WHERE "round" = 1 AND "opponent" = 'bobby mcmaster'

Question: what is the location when the time is 3:15?
SQL: SELECT "location" FROM mma_fights_21 WHERE "time" = '3:15'

Question: what is the record when the round is before 3 and the time si 4:59?
SQL: SELECT "record" FROM mma_fights_21 WHERE "round" < 3 AND "time" = '4:59'

Question: what is the record when the event is shido usa mma and the opponent is raphael assunção?
SQL: SELECT "record" FROM mma_fights_21 WHERE "event" = 'shido usa mma' AND "opponent" = 'raphael assunção'