Table: balt_county_del
Columns: district
counties_represented
delegate
party
first_elected
committee

Question: What district is represented by a Republican Appropriations Committee?
SQL: SELECT "district" FROM balt_county_del WHERE "party" = 'Republican' AND "committee" = 'Appropriations'

Question: What are the districts represented by the Democratic Party and a Committee in Economic Matters?
SQL: SELECT "district" FROM balt_county_del WHERE "committee" = 'Economic Matters' AND "party" = 'Democratic'