Schema: CREATE TABLE record (swimmer_id VARCHAR); CREATE TABLE swimmer (name VARCHAR, id VARCHAR)
Question: Find the names of the swimmers who have both "win" and "loss" results in the record.
SQL: SELECT t1.name FROM swimmer AS t1 JOIN record AS t2 ON t1.id = t2.swimmer_id WHERE RESULT = 'Win' INTERSECT SELECT t1.name FROM swimmer AS t1 JOIN record AS t2 ON t1.id = t2.swimmer_id WHERE RESULT = 'Loss'