關鍵字'SELECT'附近的語法不正確。創建一個視圖錯誤

Question

我正在爲一個任務創建數據庫的視圖，

我不斷在我的代碼中收到此錯誤。

CREATE VIEW Rental_View 

SELECT Mo.Movie_ID, copy_id, mo.Movie_Name, format_name 
FROM Movies AS mo JOIN copies AS co 
ON mo.Movie_ID = co.movie_id 
JOIN format AS fo 
ON co.Format_id = fo.format_id 

SELECT c.customer_id, rental_ID, DATEDIFF (day, rental_date, return_date) AS rental_duration' , c.first_name + ' ' + c.last_name AS customer_name 
FROM Customers AS c INNER JOIN rentals AS r 
ON c.customer_ID = r.customer_ID 

在第一個SELECT語句是紅色下劃線和我得到的錯誤

「關鍵字‘SELECT’附近有語法錯誤。」

我簡直不知道如何解決這個，因爲我是相當新的SQL，任何幫助將不勝感激。

在此先感謝。

Answer 1

您需要AS keyw ORD：

CREATE VIEW Rental_View AS   --- <------ AS needed here 

SELECT mo.Movie_ID      --- mo, not Mo 
    , co.copy_id      --- play safe and declare which table 
    , mo.Movie_Name 
    , fo.format_name     --- are these two columns from 
FROM Movies AS mo JOIN copies AS co 
ON mo.Movie_ID = co.movie_id 
JOIN format AS fo 
ON co.Format_id = fo.format_id 
;          --- add a ; if you want to 
             --- run multiple statements 

---

如果你想兩個SELECT結合在一個，你需要JOIN的兩個表，像這樣的東西：

CREATE VIEW Rental_View AS   

SELECT mo.Movie_ID      
    , co.copy_id      
    , mo.Movie_Name 
    , fo.format_name     
    , c.customer_id 
    , rental_ID 
    , DATEDIFF (day, rental_date, return_date) AS rental_duration 
    , c.first_name + ' ' + c.last_name AS customer_name 
FROM Movies AS mo 
    JOIN copies AS co 
    ON mo.Movie_ID = co.movie_id 
    JOIN format AS fo 
    ON co.Format_id = fo.format_id 

    JOIN rentals AS r 
    ON r.movie_id = mo.Movie_id  --- just a guess, you have to write this 
    JOIN Customers AS c 
    ON c.customer_ID = r.customer_ID 

Answer 2

你看看上面有rental_duration後的誤操作單引號在此代碼 -

SELECT c.customer_id, rental_ID, DATEDIFF (day, rental_date, return_date) AS rental_duration' , c.first_name + ' ' + c.last_name AS customer_name 
FROM Customers AS c INNER JOIN rentals AS r 
ON c.customer_ID = r.customer_ID 

嘗試

SELECT c.customer_id, rental_ID, DATEDIFF (day, rental_date, return_date) AS rental_duration , c.first_name + ' ' + c.last_name AS customer_name 
FROM Customers AS c INNER JOIN rentals AS r 
ON c.customer_ID = r.customer_ID 

Answer 3

CREATE VIEW Rental_View 
AS 

你缺少的 「AS」 關鍵字

Answer 4

你可以嘗試改變第一從

選擇選擇Mo.Movie_ID，copy_id，mo.Movie_Name，FORMAT_NAME

到

選擇mo.Movie_ID，copy_id，mo.Movie_Name，FORMAT_NAME

Answer 5

有在你已經發布的代碼多個錯誤。

1. 對於SELECE語句，CREATE VIEW語句需要AS關鍵字。你可能會這樣做：

   CREATE VIEW Rental_View 
   AS 
   SELECT Mo.Movie_ID, copy_id, mo.Movie_Name, format_name 
   FROM Movies AS mo JOIN copies AS co 
   ON mo.Movie_ID = co.movie_id 
   JOIN format AS fo 
   ON co.Format_id = fo.format_id 
   

2. 而且我可以看到另一個SELECT語句，這在視圖中沒有任何意義。添加第二個SELECT語句會導致錯誤「關鍵字'SELECT'附近的語法錯誤。」爲第二個SELECT語句。

Answer 6

嘗試：

CREATE VIEW Rental_View 
AS 
    SELECT Mo.Movie_ID, copy_id, mo.Movie_Name, format_name 
    FROM Movies AS mo JOIN copies AS co 
    ON mo.Movie_ID = co.movie_id 
    JOIN format AS fo 
    ON co.Format_id = fo.format_id 

CREATE VIEW Rental_Duration 
AS 
     SELECT c.customer_id, rental_ID, DATEDIFF (day, rental_date, return_date) AS rental_duration , c.first_name + ' ' + c.last_name AS customer_name 
     FROM Customers AS c INNER JOIN rentals AS r 
    ON c.customer_ID = r.customer_ID 

通常，您不必創建一個視圖，將返回多個結果集。如果這是真的，你的願望是什麼，然後一個BEGIN/END塊應該解決的問題（未測試 - 不盈任何關係數據庫管理系統的現在）：

CREATE VIEW Rental_View 
AS 
BEGIN 
    SELECT Mo.Movie_ID, copy_id, mo.Movie_Name, format_name 
    FROM Movies AS mo JOIN copies AS co 
    ON mo.Movie_ID = co.movie_id 
    JOIN format AS fo 
    ON co.Format_id = fo.format_id 

    SELECT c.customer_id, rental_ID, DATEDIFF (day, rental_date, return_date) AS rental_duration , c.first_name + ' ' + c.last_name AS customer_name 
     FROM Customers AS c INNER JOIN rentals AS r 
    ON c.customer_ID = r.customer_ID 
END