Table: arg_85_football
Columns: home_1st_leg
home_2nd_leg
1st_leg
2nd_leg
aggregate

Question: How many 2nd legs had an aggregate of 2-4?
SQL: SELECT COUNT("2nd_leg") FROM arg_85_football WHERE "aggregate" = '2-4'

Question: How many home (2nd leg) had a 1st leg 1-1?
SQL: SELECT COUNT("home_2nd_leg") FROM arg_85_football WHERE "1st_leg" = '1-1'

Question: How many 2nd legs are there where home (1st leg) is Independiente?
SQL: SELECT "2nd_leg" FROM arg_85_football WHERE "home_1st_leg" = 'Independiente'

Question: Who was in home (2nd leg) when Talleres was in home  (1st leg)
SQL: SELECT "home_2nd_leg" FROM arg_85_football WHERE "home_1st_leg" = 'Talleres'

Question: Who was in 2nd leg when Boca Juniors was in home (1st leg)?
SQL: SELECT "2nd_leg" FROM arg_85_football WHERE "home_1st_leg" = 'Boca Juniors'