Mysql SQL查询不存在

我们有两个销售不同类型商品的系统。我们希望显示仅在Sandbox1中拥有帐户的客户，而不是在Sandbox2中拥有帐户的客户。我使用了WHERE NOT EXISTS，但我不确定它是否正常工作。我在尝试运行时遇到一个错误：将nvarchar值“MSTO15”转换为数据类型int时，转换失败。因此，我不确定是什么导致了这一错误，或者我的查询是否正确

任何帮助都将不胜感激

SELECT [Account #], Accounts, [Prior Annual], [Prior Annual1], [Prior Annual2]
FROM Sandbox1.dbo.SalesHistory as s
WHERE NOT EXISTS
    (SELECT * 
     FROM Sandbox2.dbo.customer_master as m
     WHERE s.[Account #] = 
           m.customer_number)

试试这个：

SELECT [Account #], Accounts, [Prior Annual], [Prior Annual1], [Prior Annual2]
FROM Sandbox1.dbo.SalesHistory as s
where s.[Account #] not in (select [Account #] from Sandbox2.customer_master)

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您能分享一些示例数据和您想要实现的结果吗？s.[Account#]和m.customer#u number的数据类型是什么？根据错误消息，一个似乎是整数，另一个是字符……一个是int，另一个是varchar

SELECT [Account #], Accounts, [Prior Annual], [Prior Annual1], [Prior Annual2]
FROM Sandbox1.dbo.SalesHistory as s
WHERE NOT EXISTS
    (SELECT * 
     FROM Sandbox2.dbo.customer_master as m
     WHERE convert(nvarchar,s.[Account #]) = 
           convert(nvarchar,m.customer_number))