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Question

一個PROC我有表名爲my_table與此架構：

+----+--------------------------+-----------------------------+--------------------+ 
| ID | name (4 possible values) | action (2 possible values) | sequence (1,2...n) | 
+----+--------------------------+-----------------------------+--------------------+ 

我想創建一個存儲過程，可以根據從sequence列的順序處理數據。此存儲過程應查看sequence中的值，然後執行相應的存儲過程。目前我有8個獨立的存儲過程。

例如，如果seq = 1則應執行存儲過程＃1。 如果seq = 2取決於name和action的值，它將轉到存儲過程＃4。有8個可能的匹配。

這裏是我的嘗試：

SET NOCOUNT ON 
DECLARE @name varchar(20), @action varchar(20), @ID int, @Seq varchar(20) 
DECLARE ILOOP CURSOR FOR SELECT ID, Name, Action, Seq FROM my_table 
OPEN ILOOP 
FETCH NEXT FROM iloop INTO @ID, @name, @Action, @Seq 
WHILE @@Fetch_Status = 0 BEGIN 
    SELECT * From my_table WHERE Name = case Name when 'provider' 
    then EXEC sp1 
END 
CLOSE ILOOP 
DEALLOCATE ILOOP 
RETURN 

Answer 1

你忘了告訴我們有關選擇他們採取的存儲過程或什麼參數的具體邏輯什麼，但似乎你需要的東西沿着這些路線。

SET NOCOUNT ON 

DECLARE @Name VARCHAR(20) , 
    @Action VARCHAR(20) , 
    @ID INT , 
    @Seq VARCHAR(20) 

DECLARE ILOOP CURSOR 
FOR 
    SELECT ID , 
      Name , 
      Action , 
      Seq 
    FROM my_table 
    ORDER BY Seq 

OPEN ILOOP 
FETCH NEXT FROM ILOOP INTO @ID, @Name, @Action, @Seq 
WHILE @@Fetch_Status = 0 
    BEGIN 
     IF @Name = 'A' 
      AND @Action = 'X' 
      EXEC sp1 @Action, @ID, @Name 
     ELSE 
      IF @Name = 'C' 
       AND @Action = 'Y' 
       EXEC sp2 @Action, @ID, @Name 

     FETCH NEXT FROM ILOOP INTO @ID, @Name, @Action, @Seq  
    END 
CLOSE ILOOP 
DEALLOCATE ILOOP