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_1342315_17 (district VARCHAR, incumbent VARCHAR)
### Question:
How many districts does riley joseph wilson?
### Answer:
SELECT COUNT(district) FROM table_1342315_17 WHERE incumbent = "Riley Joseph Wilson"