如何從查詢搜索的列中排除某些值

Question

我試圖排除任何未在查詢搜索中映射的條目，我在網上看到了一個示例，但我認為自己在樹錯誤的位置。

SELECT 
LocationID, LocationAddress 
FROM tblLawncare 
WHERE ISNULL(Hide,0) = 0 
AND LocationAddress 
IS NOT Not Mapped  
ORDER BY LocationID

Answer 1

你是這個意思？

SELECT 
LocationID, LocationAddress 
FROM tblLawncare 
WHERE ISNULL(Hide,0) = 0 
AND LocationAddress <> 'not mapped'
ORDER BY LocationID

Answer 2

SELECT 
LocationID, LocationAddress 
FROM tblLawncare 
WHERE ISNULL(Hide,0) = 0 
AND LocationAddress <> 'not mapped' 
ORDER BY LocationID

盡管我不確定您的WHERE ISNULL(Hide, 0) = 0應該做什么。 什么是Hide ？