SQL - 如何選擇多個表並從同一列中連接多行？

Question

如何選擇多個表並從同一列中連接多行？

它不返回painting.id_group,painting.id_type和painting.id_location。 我確定這個SQL代碼片段的語法錯誤。

SELECT painting.id, painting.order, painting_en.url, id_portfolio.en 
FROM painting 
LEFT JOIN painting_en 
USING (id) 
LEFT JOIN id_portfolio ON id_portfolio.id = painting.id_group 
AND id_portfolio.id = painting.id_type 
AND id_portfolio.id = painting.id_location 
WHERE painting_en.url='2011-name3' 
LIMIT 1 

更新： 它顯示Showing rows 0 - 0 (1 total, Query took 0.0004 sec)。 去除

AND id_portfolio.id = painting.id_type 
AND id_portfolio.id = painting.id_location 

後返回：

id  | order | url  |en 
----------+-------+------------+----- 
09518709 | 4  | 2011-name3 | NULL 

，但我需要返回：

id  | order | url  | group | type   | location 
----------+-------+------------+---------+---------------+--------- 
09518709 | 4  | 2011-name3 | realism | oil on canvas | US 

Answer 1

你可以加入到同一個表多次，你只需要給不同的別名

SELECT painting.id, 
     painting.order, 
     painting_en.url, 
     `group`.en AS `group`, 
     TYPE.en AS type, 
     location.en AS location 
FROM painting 
     LEFT JOIN painting_en 
     USING (id) 
     LEFT JOIN id_portfolio `group` 
     ON `group`.id = painting.id_group 
     LEFT JOIN id_portfolio TYPE 
     ON TYPE.id = painting.id_type 
     LEFT JOIN id_portfolio location 
     ON location.id = painting.id_location 
WHERE painting_en.url = '2011-name3' 
LIMIT 1