In the sixth round, what is the sum of fixtures when there were more than 15 clubs involved?
CREATE TABLE table_name_67 (fixtures INTEGER, round VARCHAR, clubs_involved VARCHAR)
SELECT SUM(fixtures) FROM table_name_67 WHERE round = "sixth round" AND clubs_involved > 15
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_67 (fixtures INTEGER, round VARCHAR, clubs_involved VARCHAR) Question: In the sixth round, what is the sum of fixtures when there were more than 15 clubs involved? [/INST] SELECT SUM(fixtures) FROM table_name_67 WHERE round = "sixth round" AND clubs_involved > 15 </s>