Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_22274142_1 (launch_date VARCHAR, transmission VARCHAR)
### Question:
How many launch dates are there for digital transmission?
### Answer:
SELECT COUNT(launch_date) FROM table_22274142_1 WHERE transmission = "Digital"