這是在Oracle數據庫中使用MERGE的唯一方法嗎？

Question

我正在移動我的第一步與Sql Server數據庫項目，我正在尋找一種方法來填充後部署腳本中的引用表，而無需每次刪除和重新填充它們。經過一番研究，我偶然發現了這個博客條目：

http://blogs.msdn.com/b/ssdt/archive/2012/02/02/including-data-in-an-sql-server-database-project.aspx

，基本上描述了這個例子中，MERGE語句的行爲：

-- Reference Data for AddressType 
MERGE INTO AddressType AS Target 
USING (VALUES 
    (0, N'Undefined'), 
    (1, N'Billing'), 
    (2, N'Home'), 
    (3, N'Main Office'), 
    (4, N'Primary'), 
    (5, N'Shipping'), 
    (6, N'Archive') 
) 
AS Source (AddressTypeID, Name) 
ON Target.AddressTypeID = Source.AddressTypeID 
-- update matched rows 
WHEN MATCHED THEN 
UPDATE SET Name = Source.Name 
-- insert new rows 
WHEN NOT MATCHED BY TARGET THEN 
INSERT (AddressTypeID, Name) 
VALUES (AddressTypeID, Name) 
-- delete rows that are in the target but not the source 
WHEN NOT MATCHED BY SOURCE THEN 
DELETE 

自從我與Oracle數據庫也工作，我已經試過使之前的示例適應Oracle 10g語法，並且我生成了類似如下的內容：

-- Reference Data for AddressType 
MERGE INTO AddressType AS T 
USING (WITH CTE AS (
    SELECT 0 AS AddressTypeID, 'Undefined' AS Name FROM DUAL 
    UNION 
    SELECT 1 AS AddressTypeID, 'Billing' AS Name FROM DUAL 
    UNION 
    SELECT 2 AS AddressTypeID, 'Home' AS Name FROM DUAL 
    UNION 
    SELECT 3 AS AddressTypeID, 'Main Office' AS Name FROM DUAL 
    UNION 
    SELECT 4 AS AddressTypeID, 'Primary' AS Name FROM DUAL 
    UNION 
    SELECT 5 AS AddressTypeID, 'Shipping' AS Name FROM DUAL 
    UNION 
    SELECT 6 AS AddressTypeID, 'Archive'AS Name FROM DUAL 
) 
SELECT AddressTypeID, Name FROM CTE 
) 
AS S 
ON T.AddressTypeID = S.AddressTypeID 
-- update matched rows 
WHEN MATCHED THEN 
UPDATE SET T.Name = S.Name 
-- insert new rows 
WHEN NOT MATCHED 
INSERT (T.AddressTypeID, T.Name) 
VALUES (S.AddressTypeID, S.Name) 

除了不完美y等效（不刪除不在源代碼中的行）我發現語法特別尷尬。

Oracle SQL有任何可用的語法快捷方式嗎？

Answer 1

我沒有看到任何快捷方式，的語法MERGE就是您隨身攜帶的。

您可以刪除的唯一東西是WITH子句即USING子句中的CTE。你可以簡單地把它作爲：

-- Reference Data for AddressType 
MERGE INTO AddressType AS T 
USING (
    SELECT 0 AS AddressTypeID, 'Undefined' AS Name FROM DUAL 
    UNION 
    SELECT 1 AS AddressTypeID, 'Billing' AS Name FROM DUAL 
    UNION 
    SELECT 2 AS AddressTypeID, 'Home' AS Name FROM DUAL 
    UNION 
    SELECT 3 AS AddressTypeID, 'Main Office' AS Name FROM DUAL 
    UNION 
    SELECT 4 AS AddressTypeID, 'Primary' AS Name FROM DUAL 
    UNION 
    SELECT 5 AS AddressTypeID, 'Shipping' AS Name FROM DUAL 
    UNION 
    SELECT 6 AS AddressTypeID, 'Archive'AS NAME FROM DUAL 
    ) AS S 
ON T.AddressTypeID = S.AddressTypeID 
-- update matched rows 
WHEN MATCHED THEN 
UPDATE SET T.Name = S.Name 
-- insert new rows 
WHEN NOT MATCHED 
INSERT (T.AddressTypeID, T.Name) 
VALUES (S.AddressTypeID, S.Name) 

，當然，你不能更新ON條款中提到的列。