How many dates have boston college as the opponent?
CREATE TABLE table_21091162_1 (date VARCHAR, opponent VARCHAR)
SELECT COUNT(date) FROM table_21091162_1 WHERE opponent = "Boston College"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_21091162_1 (date VARCHAR, opponent VARCHAR) Question: How many dates have boston college as the opponent? [/INST] SELECT COUNT(date) FROM table_21091162_1 WHERE opponent = "Boston College" </s>