Table: french_open_mens_doubles
Columns: country
amateur_era
open_era
all_time
first_title
last_title

Question: What is the sum of All-Time, when Amateur Era is less than 0?
SQL: SELECT SUM("all_time") FROM french_open_mens_doubles WHERE "amateur_era" < 0

Question: What is the lowest All-Time, when First Title is before 1974, when Last Title is "1933", and when Amateur Era is greater than 2?
SQL: SELECT MIN("all_time") FROM french_open_mens_doubles WHERE "first_title" < 1974 AND "last_title" = 1933 AND "amateur_era" > 2

Question: What is the lowest All-Time, when First Title is "2007, and when Amateur Era is greater than 0?
SQL: SELECT MIN("all_time") FROM french_open_mens_doubles WHERE "first_title" = 2007 AND "amateur_era" > 0

Question: What is the lowest First Title, when All-Time is greater than 1, when Country is "United States (USA)", and when Amateur Era is greater than 17?
SQL: SELECT MIN("first_title") FROM french_open_mens_doubles WHERE "all_time" > 1 AND "country" = 'united states (usa)' AND "amateur_era" > 17