复杂的SQL查询过滤器

Question

我有一个名为CompApps的表，我希望根据多条件查询检索特定记录。我的SQL非常生疏，这就是我要求Stack Overflow的原因。我需要的是修改下面的SQL以包含一个where子句，它将在Interface，ExAPI，ExtraInfo，OpenCol等字段中排除没有任何相关信息的记录。也就是说，在下面的当前查询结果的图像中，我想要行170, 173, 174, 175, 177, 182, 185, 190和NOT行，其中只有None，N \ A或接口，ExAPI，ExtraInfo，OpenCol

中的空值

SELECT RefNum, Interface, ExAPI, ExtraInfo, OpenCol
FROM CompApps

Answer 1

或者可能喜欢这个

根据dnoeth的评论对此进行更正：

SELECT RefNum, Interface, ExAPI, ExtraInfo, OpenCol
FROM CompApps
WHERE Interface NOT IN('None','N/A')
   OR ExAPI NOT IN('None','N/A')
   OR ExtraInfo NOT IN('None','N/A')
   OR OpenCol NOT IN('None','N/A');

Answer 2

where 
(
    (ISNULL(ExAPI, '') <> '' OR ExAPI <> 'N/A' OR ExAPI <> 'None')
    OR
    (ISNULL(ExtraInfo, '') <> '' OR ExtraInfo<> 'N/A' OR ExtraInfo<> 'None')
    OR
    (ISNULL(OpenCol, '') <> '' OR OpenCol<> 'N/A' OR OpenCol<> 'None')
)

Answer 3

试试这个

SELECT RefNum, Interface, ExAPI, ExtraInfo, OpenCol
FROM CompApps
WHERE (Interface NOT IN ('','None','N/A'))
   OR (ExAPI NOT IN ('','None','N/A'))
   OR (ExtraInfo NOT IN ('','None','N/A'))
   OR (OpenCol NOT IN ('','None','N/A'))