Question

请帮帮我

SELECT mainmenu.mid FROM (
(
SELECT 
    content_info.ContentID, 
    content_info.Title,
    menu_list_article.MenuID as article_parent,
    subsubmenu.title as article_parent_title,
    submenu.sid,
    submenu.title as sid_title,
    mainmenu.mid,
    mainmenu.title as mid_title,
    mainmenu.module
FROM `content_info`
JOIN menu_list_article ON menu_list_article.ContentID = content_info.ContentID
JOIN subsubmenu ON subsubmenu.ssid=menu_list_article.MenuID
JOIN submenu ON submenu.sid=subsubmenu.sid
JOIN mainmenu ON mainmenu.mid=submenu.mid
WHERE menu_list_article.MenuID LIKE 'SSMN%'

) UNION 
 (
    SELECT 
    content_info.ContentID, 
    content_info.Title,
    menu_list_article.MenuID as article_parent,
    submenu.title as article_parent_title,
    mainmenu.mid,
    mainmenu.title as mid_title,
    mainmenu.module
FROM `content_info`
JOIN menu_list_article ON menu_list_article.ContentID = content_info.ContentID
JOIN submenu ON submenu.sid=menu_list_article.MenuID
JOIN mainmenu ON mainmenu.mid=submenu.mid
WHERE menu_list_article.MenuID LIKE 'SMN%'
 )
)
WHERE mainmenu.mid='MN-0053'

Answer 1

我会有机会回答这个“问题”：

SELECT 
    content_info.ContentID, 
    content_info.Title,
    menu_list_article.MenuID as article_parent,
    submenu.title as article_parent_title,
    mainmenu.mid,
    mainmenu.title as mid_title,
    mainmenu.module
FROM `content_info`
INNER JOIN menu_list_article ON menu_list_article.ContentID = content_info.ContentID
INNER JOIN submenu ON submenu.sid=menu_list_article.MenuID
INNER JOIN mainmenu ON mainmenu.mid=submenu.mid
WHERE menu_list_article.MenuID LIKE 'SSMN%' and mainmenu.mid='MN-0053'
 UNION 
    SELECT 
    content_info.ContentID, 
    content_info.Title,
    menu_list_article.MenuID as article_parent,
    submenu.title as article_parent_title,
    mainmenu.mid,
    mainmenu.title as mid_title,
    mainmenu.module
FROM `content_info`
INNER JOIN menu_list_article ON menu_list_article.ContentID = content_info.ContentID
INNER JOIN submenu ON submenu.sid=menu_list_article.MenuID
INNER JOIN mainmenu ON mainmenu.mid=submenu.mid
WHERE menu_list_article.MenuID LIKE 'SMN%' and mainmenu.mid='MN-0053'

没有理由在第一个查询中有子选择，我将最外面的标准移动到2个查询中，并且我将连接定义为内部连接（您可能必须根据您的要求使用左或右连接，但我猜不出那些。）

下次请描述您的问题，并向我们提供有关该任务的更多背景信息。

＃1248 - 每个派生表必须有自己的别名

1 个答案: