What day did the platform sell 9.87 million units?
CREATE TABLE table_18590048_1 (
    release_date VARCHAR,
    units_sold__in_millions_ VARCHAR
)
SELECT release_date FROM table_18590048_1 WHERE units_sold__in_millions_ = "9.87"
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: What day did the platform sell 9.87 million units? ### Input: CREATE TABLE table_18590048_1 (
    release_date VARCHAR,
    units_sold__in_millions_ VARCHAR
) ### Response: SELECT release_date FROM table_18590048_1 WHERE units_sold__in_millions_ = "9.87"