how many total districts are there in this area ?
CREATE TABLE table_204_579 (
    id number,
    "code" text,
    "district" text,
    "headquarters" text,
    "population (as of 2011)" number,
    "area (km2)" number,
    "density (/km2)" number
)
SELECT COUNT("district") FROM table_204_579
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: how many total districts are there in this area ? ### Input: CREATE TABLE table_204_579 (
    id number,
    "code" text,
    "district" text,
    "headquarters" text,
    "population (as of 2011)" number,
    "area (km2)" number,
    "density (/km2)" number
) ### Response: SELECT COUNT("district") FROM table_204_579