Table: badminton_champs
Columns: year
mens_singles
womens_singles
men_doubles
womens_doubles
mixed_doubles

Question: Name the men doubles for els baert
SQL: SELECT "men_doubles" FROM badminton_champs WHERE "womens_singles" = 'Els Baert'

Question: Name the men doubles for caroline persyn smids
SQL: SELECT "men_doubles" FROM badminton_champs WHERE "womens_doubles" = 'Caroline Persyn Smids'

Question: Name the number of men doubles for 2007
SQL: SELECT COUNT("men_doubles") FROM badminton_champs WHERE "year" = 2007