減少我的SQL代碼的長度

Question

我對此SQL查詢使用第三方軟件，它具有各種限制，其中一個限制爲1,000個字符。我已經創建了一些代碼，用於瀏覽註冊到特定帳戶的聯繫人號碼列表，並創建了專門爲此任務創建的視圖。我目前的腳本（見下文）有效，但帶回了重複的響應。我想縮短代碼的長度，並只選擇Distinct響應。

作爲背景，CRM系統，這是掛有多個地方有人可以留下聯繫電話，所以我需要的代碼，以消除任何重複時，它顯示的響應。當前的代碼不會嘗試刪除重複由於上述字符的限制，它是：

SELECT [Contact_Mobile_Phone] AS V, [Contact_Mobile_Phone] AS D 
FROM [DatabaseName] 
WHERE MAINLKUPID = '{Import.TenantID}' AND [Contact_Mobile_Phone] IS NOT NULL 
UNION ALL 
SELECT [Contact_Home_Phone] AS V, [Contact_Home_Phone] AS D 
FROM [DatabaseName] 
WHERE MAINLKUPID = '{Import.TenantID}' AND [Contact_Home_Phone] IS NOT NULL 
UNION ALL 
SELECT [Contact_Work_Phone] AS V, [Contact_Work_Phone] AS D 
FROM [DatabaseName] 
WHERE MAINLKUPID = '{Import.TenantID}' AND [Contact_Work_Phone] IS NOT NULL 
UNION ALL 
SELECT [Group_Home_Phone] AS V, [Group_Home_Phone] AS D 
FROM [DatabaseName] 
WHERE MAINLKUPID = '{Import.TenantID}' AND [Group_Home_Phone] IS NOT NULL 
UNION ALL 
SELECT [Group_Mobile_Phone] AS V, [Group_Mobile_Phone] AS D 
FROM [DatabaseName] 
WHERE MAINLKUPID = '{Import.TenantID}' AND [Group_Mobile_Phone] IS NOT NULL 
UNION ALL 
SELECT [Contact_Home_Phone] AS V, [Contact_Home_Phone] AS D 
FROM [DatabaseName] 
WHERE [Group_ID] = '{Script.V1}' AND [Contact_Home_Phone] IS NOT NULL 
UNION ALL 
SELECT [Contact_Mobile_Phone] AS V, [Contact_Mobile_Phone] AS D 
FROM [DatabaseName] 
WHERE [Group_ID] = '{Script.V1}' AND [Contact_Mobile_Phone] IS NOT NULL 
UNION ALL 
SELECT 'Enter other number' AS V, 'Enter other number' AS D 

正如你所看到的，它不是最優雅的事情我已經編碼。我想它的樣子，是與此類似：

SELECT DISTINCT ([Contact_Mobile_Phone], [Contact_Home_Phone], [Contact_Work_Phone], [Group_Home_Phone], [Group_Mobile_Phone]) V, 
([Contact_Mobile_Phone], [Contact_Home_Phone], [Contact_Work_Phone], [Group_Home_Phone], [Group_Mobile_Phone]) D 
FROM [DatabaseName] 
WHERE MAINLKUPID = '{Import.TenantID}' AND ([Contact_Mobile_Phone], [Contact_Home_Phone], [Contact_Work_Phone], [Group_Home_Phone], [Group_Mobile_Phone]) IS NOT NULL 
AND MAINLKUPID = '{Import.TenantID}' AND ([Contact_Mobile_Phone], [Contact_Home_Phone], [Contact_Work_Phone], [Group_Home_Phone], [Group_Mobile_Phone]) IS NOT NULL 

的標準是，它需要顯示在兩列V和D.相同的結果，它需要不通過空數據拉，它每個列只需輸入一次，即使它們最初來自不同的列。我知道我理想的代碼的語法是不對的，希望有人能指出我正確的方向。提前致謝。

Answer 1

爲什麼不把代碼放在存儲過程中，只需調用「EXEC my_stored_procedure;」？那會更短！

Answer 2

你能解釋一下爲什麼你要兩次選擇相同的列，但給它不同的名字？也許你打算第一個是一個描述。如果是這樣，它應該在單引號不是方括號 - 但這會影響重複消除。

您可以執行以下操作來刪除重複項：

• 更換UNION ALL與UNION

您可以執行以下操作，以減少大小：

• 刪除所有方括號
• 刪除as V和as D來自所有，但第一個查詢

如果這還不夠短，然後取出NULL比較和查詢的結構爲：

select * 
from (<your query here with no null comparisons and `union` instead of `union all`) x 
where d is not null; 

Answer 3

select phone_num as V,phone_num as D 
from [DatabaseName] unpivot (phone_num for phone_type in ([Contact_Mobile_Phone],[Contact_Home_Phone],[Contact_Work_Phone],[Group_Home_Phone],[Group_Mobile_Phone])) u 
where MAINLKUPID = '{Import.TenantID}' 
union 
select phone_num as V,phone_num as D 
from [DatabaseName] unpivot (phone_num for phone_type in ([Contact_Home_Phone],[Contact_Mobile_Phone])) u 
WHERE [Group_ID] = '{Script.V1}' 
union all 
SELECT 'Enter other number','Enter other number'