Table: match_details_3
Columns: match
date
competition_or_tour
ground
opponent
score1

Question: What is the date ground A and Cartagena as an opponent?
SQL: SELECT "date" FROM match_details_3 WHERE "ground" = 'a' AND "opponent" = 'cartagena'

Question: What ground has a match smaller than 2?
SQL: SELECT "ground" FROM match_details_3 WHERE "match" < 2

Question: What is the score of the competition of friendly, at match 7?
SQL: SELECT "score1" FROM match_details_3 WHERE "competition_or_tour" = 'friendly' AND "match" = 7