Table: copa_del_rey_match
Columns: team_1
agg
team_2
1st_leg
2nd_leg

Question: What is Celta's Agg.?
SQL: SELECT "agg" FROM copa_del_rey_match WHERE "team_1" = 'celta'

Question: What is the 2nd leg for Barcelona Team 2?
SQL: SELECT "2nd_leg" FROM copa_del_rey_match WHERE "team_2" = 'barcelona'

Question: What is team 2 if Team 1 is Numancia?
SQL: SELECT "team_2" FROM copa_del_rey_match WHERE "team_1" = 'numancia'