What was the main date of the round with 20 fixtures?
CREATE TABLE table_name_81 (main_date VARCHAR, number_of_fixtures VARCHAR)
SELECT main_date FROM table_name_81 WHERE number_of_fixtures = 20
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_81 (main_date VARCHAR, number_of_fixtures VARCHAR) Question: What was the main date of the round with 20 fixtures? [/INST] SELECT main_date FROM table_name_81 WHERE number_of_fixtures = 20 </s>