On how many different dates did schools from Chestnut Hill, Massachusetts join the conference?
CREATE TABLE table_1973842_1 (joined VARCHAR, location VARCHAR)
SELECT COUNT(joined) FROM table_1973842_1 WHERE location = "Chestnut Hill, Massachusetts"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_1973842_1 (joined VARCHAR, location VARCHAR) Question: On how many different dates did schools from Chestnut Hill, Massachusetts join the conference? [/INST] SELECT COUNT(joined) FROM table_1973842_1 WHERE location = "Chestnut Hill, Massachusetts" </s>