顯示數據如果計數（不同）爲0

Question

SQL Server 2008的

SQL查詢顯示IP地址（如果存在）

SELECT [IP_ADDR1_TEXT], COUNT(distinct [IP_ADDR1_TEXT]) as Instances 
FROM sem_computer, [dbo].[V_SEM_COMPUTER] 
WHERE sem_computer.COMPUTER_ID = [dbo].[V_SEM_COMPUTER].COMPUTER_ID 
AND [IP_ADDR1_TEXT] = '10.10.10.10' 
GROUP BY [IP_ADDR1_TEXT] 

輸出

IP_ADDR1_TEXT Instances 
10.10.10.10   1 

如果IP地址計數爲0時，輸出一片空白。

如何修改查詢，以便實例輸出0，旁邊不存在的IP地址，即

SELECT [IP_ADDR1_TEXT], COUNT(distinct [IP_ADDR1_TEXT]) as Instances 
FROM sem_computer, [dbo].[V_SEM_COMPUTER] 
WHERE sem_computer.COMPUTER_ID = [dbo].[V_SEM_COMPUTER].COMPUTER_ID 
AND [IP_ADDR1_TEXT] = '10.10.10.11' 
GROUP BY [IP_ADDR1_TEXT] 

應該輸出

IP_ADDR1_TEXT Instances 
10.10.10.11   0 

編輯

VIEW的屏幕截圖

IP_ADDR1_TEXT是一個別名

柱 CAST（CASE WHEN IP_ADDR1 < 0 THEN 0xFFFFFFFF的+ IP_ADDR1 ELSE IP_ADDR1 END/256/256/256 & 0xFF的AS VARCHAR）+ '' + CAST（CASE當IP_ADDR1 < 0 THEN 0xFFFFFFFF + IP_ADDR1 ELSE IP_ADDR1 END/256/256 & 0xFF AS VARCHAR）+'。' + CAST（CASE當IP_ADDR1 < 0 THEN 0xFFFFFFFF + IP_ADDR1 ELSE IP_ADDR1 END/256 & 0xFF AS VARCHAR）+'。' + CAST（CASE WHEN IP_ADDR1 < 0，那麼0xFFFFFFFF的+ IP_ADDR1 ELSE IP_ADDR1 END & 0xFF的AS VARCHAR）

Answer 1

SELECT [IP_ADDR1_TEXT], COALESCE(COUNT(distinct [IP_ADDR1_TEXT]),0) as Instances 
FROM sem_computer LEFT JOIN [dbo].[V_SEM_COMPUTER] 
    ON sem_computer.COMPUTER_ID = [dbo].[V_SEM_COMPUTER].COMPUTER_ID 
AND [IP_ADDR1_TEXT] = '10.10.10.11' 
GROUP BY [IP_ADDR1_TEXT] 

Answer 2

也許試試這個：

SELECT [IP_ADDR1_TEXT], COUNT(distinct [IP_ADDR1_TEXT]) as Instances 
FROM sem_computer 
Left JOin [dbo].[V_SEM_COMPUTER] On sem_computer.COMPUTER_ID = [dbo].[V_SEM_COMPUTER].COMPUTER_ID 
WHERE [IP_ADDR1_TEXT] = '10.10.10.10' 
GROUP BY [IP_ADDR1_TEXT]