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_23718905_6 (matchup_results VARCHAR, city VARCHAR)
### Question:
How many different matchup/results appear in San Diego, California?
### Answer:
SELECT COUNT(matchup_results) FROM table_23718905_6 WHERE city = "San Diego, California"