how long between the operations first commenced and the last airline to commence operations ?
CREATE TABLE table_204_163 (
    id number,
    "airline" text,
    "icao" text,
    "iata" text,
    "callsign" text,
    "commenced\noperations" number
)
SELECT (SELECT "commenced\noperations" FROM table_204_163 ORDER BY "commenced\noperations" DESC LIMIT 1) - (SELECT "commenced\noperations" FROM table_204_163 ORDER BY "commenced\noperations" LIMIT 1)
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 long between the operations first commenced and the last airline to commence operations ? ### Input: CREATE TABLE table_204_163 (
    id number,
    "airline" text,
    "icao" text,
    "iata" text,
    "callsign" text,
    "commenced\noperations" number
) ### Response: SELECT (SELECT "commenced\noperations" FROM table_204_163 ORDER BY "commenced\noperations" DESC LIMIT 1) - (SELECT "commenced\noperations" FROM table_204_163 ORDER BY "commenced\noperations" LIMIT 1)