'0'の値が示されていない

Question

SELECT DISTINCT ISNULL(a.[BPOAGE], 0) AS BPOAGE, a.[BPOAttic] 
FROM [Legacy].[dbo].[MyTables] as a 

結果：

SELECT DISTINCT ISNULL(a.[BPOAGE], 0) AS BPOAGE, a.[BPOAttic] 
FROM [Legacy].[dbo].[MyTables] as a 
where (a.[BPOAGE] not in ('New')) 

結果：

Q：a.[BPOAGE] not in ('New')を入力すると0の値が表示されない理由を教えてください。

Answer 1

SQLが三つに取り組んでいますが、それは不明であるので、それはあなたが含めたいwrite.Ifヌル

SELECT DISTINCT ISNULL(a.[BPOAGE], 0) AS BPOAGE,a.[BPOAttic] FROM [Legacy]. 
    [dbo].[MyTables] as a where (a.[BPOAGE] not in ('New') or a.[BPOAGE] is null)