What is the date of the match on clay with score of 6-3 2-6 6-4?
CREATE TABLE table_name_15 (date VARCHAR, surface VARCHAR, score VARCHAR)
SELECT date FROM table_name_15 WHERE surface = "clay" AND score = "6-3 2-6 6-4"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_15 (date VARCHAR, surface VARCHAR, score VARCHAR) Question: What is the date of the match on clay with score of 6-3 2-6 6-4? [/INST] SELECT date FROM table_name_15 WHERE surface = "clay" AND score = "6-3 2-6 6-4" </s>