MySQL 상관 서브쿼리

SELECT COLUMN_LIST
FROM TABLE_NAME AS OUTER_ALIAS
WHERE COLUMN_NAME > (
  SELECT AGGREGATE_FUNCTION(COLUMN_NAME)
  FROM TABLE_NAME AS INNER_ALIAS
  WHERE INNER_ALIAS.COLUMN_NAME = OUTER_ALIAS.COLUMN_NAME
);

SELECT f.title, f.rating, f.length
FROM film AS f
WHERE f.length > (SELECT AVG(f2.length) FROM film AS f2 WHERE f2.rating = f.rating)
ORDER BY f.rating, f.title
LIMIT 5;

+------------------+--------+--------+
| title            | rating | length |
+------------------+--------+--------+
| AFFAIR PREJUDICE | G      |    117 |
| AFRICAN EGG      | G      |    130 |
| ALAMO VIDEOTAPE  | G      |    126 |
...
+------------------+--------+--------+
5 rows in set (0.12 sec)