結合SQL視圖與左外連接查詢

Question

我有一個叫家的觀點：

CREATE VIEW `skohr`.`Home` AS 
Select Song_OID, Song_Name, Album_Name, Artist_First_Name, Artist_Last_Name, Band_Name, Genre, Album_Art_File_Path 
From Song, Album, Artist, Track_Number, Made 
Where Song_OID = Track_Number.Song_OID_FK AND Album_OID=Track_Number.Album_OID_FK AND Album_OID=Made.Album_OID_FK AND Artist_OID=Made.Artist_OID_FK 
ORDER BY Song_Name Asc 

我跑在視圖下面的查詢得到我想要的表：

Select DISTINCT * From Home LEFT OUTER JOIN (SELECT * FROM Song_Setting, user WHERE User_OID=User_OID_FK) AS UserSongs 
ON Song_OID=Song_OID_FK 

如何合併將兩個單獨的查詢合併爲一個來創建單個視圖？

Answer 1

儘量只創建視圖

CREATE VIEW `skohr`.`MyNewView` AS 

Select DISTINCT * From Home h 
LEFT OUTER JOIN Song_Setting x 
    ON h.Song_OID_FK = x.Song_OID 
INNER JOIN user u 
    ON u.User_OID = x.User_OID_FK 

Answer 2

::迴應置評請求MySQL版本::

我未明確使用MySQL的今天做，但有你不能使用子查詢的任何理由就像你有其他數據集一樣？這樣的事情：

Select DISTINCT * From 
(
    Select Song_OID, Song_Name, Album_Name, Artist_First_Name, Artist_Last_Name, Band_Name, Genre, Album_Art_File_Path 
    From Song, Album, Artist, Track_Number, Made 
    Where Song_OID = Track_Number.Song_OID_FK AND Album_OID=Track_Number.Album_OID_FK AND Album_OID=Made.Album_OID_FK AND Artist_OID=Made.Artist_OID_FK 
) as a 
LEFT OUTER JOIN (SELECT * FROM Song_Setting, user WHERE User_OID=User_OID_FK) AS b 
ON a.Song_OID=b.Song_OID_FK 

如果這對MySQL不起作用，我想你可能會留意使用臨時/內存表。所以考慮在MySQL中創建臨時表，創建臨時表與子查詢我在下面的CTE捕獲填充它，然後加入該到你的其他查詢。

如果這是SQL Server，您可以利用CTEs

下面的代碼只需拖放到一個視圖，它應該給你想要的東西。

WITH Home AS 
(
Select Song_OID, Song_Name, Album_Name, Artist_First_Name, Artist_Last_Name, Band_Name, Genre, Album_Art_File_Path 
From Song, Album, Artist, Track_Number, Made 
Where Song_OID = Track_Number.Song_OID_FK AND Album_OID=Track_Number.Album_OID_FK AND Album_OID=Made.Album_OID_FK AND Artist_OID=Made.Artist_OID_FK 
) 
Select DISTINCT * From Home 
LEFT OUTER JOIN (SELECT * FROM Song_Setting, user WHERE User_OID=User_OID_FK) AS UserSongs 
ON Song_OID=Song_OID_FK