MySQL_SQL執行加載順序

手寫

SELECT DISTINCT
	< select_list >
FROM
	< left_table > < join_type >
JOIN < right_table > ON < join_condition >
WHERE
	< where_condition >
GROUP BY
	< group_by_list >
HAVING
	< having_condition >
ORDER BY
	< order_by_condition >
LIMIT < limit_number >

機讀

 1. FROM < left_table > 
 2. ON < join_condition >
 3. < join_type > JOIN < right_table > 
 4. WHERE < where_condition >
 5. GROUP BY < group_by_list >
 6. HAVING < having_condition >
 7. SELECT
 8. DISTINCT < select_list >
 9. ORDER BY < order_by_condition >
10. LIMIT < limit_number >