Name the date for motogp winner of casey stoner and grand prix of valencian grand prix
CREATE TABLE table_name_15 (date VARCHAR, motogp_winner VARCHAR, grand_prix VARCHAR)
SELECT date FROM table_name_15 WHERE motogp_winner = "casey stoner" AND grand_prix = "valencian grand prix"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_15 (date VARCHAR, motogp_winner VARCHAR, grand_prix VARCHAR) Question: Name the date for motogp winner of casey stoner and grand prix of valencian grand prix [/INST] SELECT date FROM table_name_15 WHERE motogp_winner = "casey stoner" AND grand_prix = "valencian grand prix" </s>