CREATE TABLE table_12679326_1 (district VARCHAR2, committee VARCHAR2, party VARCHAR2)

What are the districts represented by the Democratic Party and a Committee in Economic Matters?
SELECT district FROM table_12679326_1 WHERE committee = "Economic Matters" AND party = "Democratic"
SELECT "district" FROM "table_12679326_1" WHERE "Democratic" = "party" AND "Economic Matters" = "committee"