CREATE TABLE table_name_31 (competition VARCHAR2, result VARCHAR2, date VARCHAR2)

What competition has a result of W on June 30, 1966?
SELECT competition FROM table_name_31 WHERE result = "w" AND date = "june 30, 1966"
SELECT "competition" FROM "table_name_31" WHERE "date" = "june 30, 1966" AND "result" = "w"