SQL - 使用合併，如果我是使用下面的查詢，我想看看有多少行已匹配計算匹配和不匹配的結果

Question

所以

MERGE (targetTable) AS t 
USING (sourceTable) AS s 
ON t.ID = s.ID 
WHEN MATCHED THEN 
    (some statements) 
WHEN NOT MATCHED BY SOURCE THEN 
    (some statements) 
WHEN NOT MATCHED BY TARGET THEN 
    (some statements) 

所以我想知道

• 匹配
• 計數不受源
• 匹配未被目標匹配

我知道你可以對輸出進行計數，但是如果我沒有記錯，輸出只能說明插入，更新和刪除。

Answer 1

可以合併之前運行是這樣的：

SELECT SUM(CASE WHEN t.ID = s.ID THEN 1 ELSE 0 END) as [Matched], 
     SUM(CASE WHEN s.ID IS NULL THEN 1 ELSE 0 END) as [NotMatchedByTarget], 
     SUM(CASE WHEN t.ID IS NULL THEN 1 ELSE 0 END) as [NotMatchedBySource] 
FROM targetTable AS t 
FULL OUTER JOIN sourceTable AS s 
    ON t.ID = s.ID