Table: rockies_1999_games
Columns: date
opponent
score
loss
attendance
record

Question: What is the average attendance against the expos?
SQL: SELECT AVG("attendance") FROM rockies_1999_games WHERE "opponent" = 'expos'

Question: What is the team's record on april 12?
SQL: SELECT "record" FROM rockies_1999_games WHERE "date" = 'april 12'

Question: Who did the team play on april 19?
SQL: SELECT "opponent" FROM rockies_1999_games WHERE "date" = 'april 19'