Table: fighter_results_45
Columns: res
record
opponent
method
event
round
time
location

Question: How many total rounds have the results of win, and n/a as the method?
SQL: SELECT COUNT("round") FROM fighter_results_45 WHERE "res" = 'win' AND "method" = 'n/a'

Question: How long did the match last in the Rings: Final Capture event?
SQL: SELECT "time" FROM fighter_results_45 WHERE "event" = 'rings: final capture'

Question: What is the result for the match against Wataru Sakata?
SQL: SELECT "res" FROM fighter_results_45 WHERE "opponent" = 'wataru sakata'

Question: The match against Oleg Taktarov had what result?
SQL: SELECT "res" FROM fighter_results_45 WHERE "opponent" = 'oleg taktarov'

Question: What was the method when 4-2 was the record?
SQL: SELECT "method" FROM fighter_results_45 WHERE "record" = '4-2'