Table: sd_flash_stats
Columns: year
division
league
reg_season
playoffs
open_cup

Question: which playoffs took place during 2011?
SQL: SELECT "playoffs" FROM sd_flash_stats WHERE "year" = '2011'

Question: which open cup was in 2012?
SQL: SELECT "open_cup" FROM sd_flash_stats WHERE "year" = '2012'

Question: when did the usl a-league have conference finals?
SQL: SELECT "year" FROM sd_flash_stats WHERE "league" = 'usl a-league' AND "playoffs" = 'conference finals'