SQL Server查詢檢查多個列的空字段

Question

我需要構造一個查詢，該查詢返回具有特定空字段的行。

例如，我有300條包含Name, Address and City的記錄。一旦一個或多個字段爲空，則需要返回。如果我例如有一行有空的City和一行有空address，都需要返回。什麼是構建這個查詢的最好方法？

我需要這個的原因是，我想構建一個顯示不完整記錄的儀表板，以便可以添加此信息。

Answer 1

SELECT * 
FROM TABLE 
WHERE Name IS NULL OR Name = '' 
OR City IS NULL OR City = '' 
OR [Address] IS NULL OR [Address] = '' 

Answer 2

SELECT Name 
    ,City 
    ,Address 
    ,... 
FROM TABLE 
WHERE NULLIF(Name,'') IS NULL 
OR NULLIF(City,'') IS NULL 
OR NULLIF([Address],'') IS NULL 

Answer 3

好了，我們的IS NULL OR和NULLIF，所以我採取COALESCE

SELECT Name 
    , City 
    , Address 
    , ... 
FROM TABLE 
WHERE COALESCE(Name,'') = '' 
    OR COALESCE(City,'') = '' 
    OR COALESCE([Address],'') = ''