SQL AND OR 查询

Question

我正在尝试 select 来自我们客户服务查询的一些消息，其中 Mmessage 所有者是 ABC，数据是 LIKE ABCDEF AND message ...并且消息是从 Customer 到 CSservice 或来自 CSservice给客户。

我该怎么做？

SELECT Date, From, To, Data 
FROM Ccustomers WITH (NoLock)
WHERE MSGowner = 'ABC' AND Data LIKE '%ABCDEF%' AND 
([From] ='Customer' AND [To] = 'CSservice') OR ([From] ='CSservice' AND [To] = 'Customer') 

ORDER by Date

Answer 1

SELECT Date, From, To, Data 
FROM Ccustomers WITH (NoLock)
WHERE MSGowner = 'ABC' 
AND Data LIKE '%ABCDEF%' 
AND 
(
   ([From] = 'Customer'  AND [To] = 'CSservice') OR 
   ([From] = 'CSservice' AND [To] = 'Customer')
)
ORDER by Date

Answer 2

您的查询基本正确。但是你必须考虑 and 连接比 or 连接 "stronger"。要获得所需的输出，您需要设置括号。

试试这个：

SELECT Date, [From], [To], Data 
FROM Ccustomers WITH (NoLock)
WHERE MSGowner = 'ABC' 
AND Data LIKE '%ABCDEF%' 
AND (([From] = 'Customer'  AND [To] = 'CSservice') OR ([From] = 'CSservice' AND [To] = 'Customer'))
ORDER BY Date;

SQL AND OR 查询

SQL AND OR query

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