我有2个查询给我相同的结果集。我试图选择哪种方法更好更快......
QUERY#1
DESCRIBE SELECT *
FROM recording r
JOIN (
SELECT r.work_id
FROM recording r
WHERE r.recording_id = 252
) t1 ON t1.work_id = r.work_id
QUERY#2
DESCRIBE SELECT *
FROM recording r
JOIN recording r2 ON r2.work_id = r.work_id
选择一种方法优于另一种方法是否有优势? 感谢