Question

我有一个包含多个字段的表，我想选择两个字段等于某个值的所有行，其中field3为1，field4为4,5,6或field3为0.但是我需要返回结果field3为0，field4为4,5,6。使用此查询，我没有使用field3 = 0返回行。

这是我的查询，

SELECT * from table where field1 = 1 AND field2 = 0 AND (field3 = 1 AND field4 !=4
AND field4 !=5
AND field4 !=6)

Answer 1

尝试这样的事情：

SELECT * from table where 
          field1 = 1 AND field2 = 0 
            AND (
                  (field3 = 1 AND (field4 = 4 OR field4 = 5 OR field4 = 6))
                     OR 
                  (field3 = 0)
                )

Answer 2

根据你的散文文本对你的陈述进行聚类和括号，你就在那里。

SELECT *
FROM
    table
WHERE
    field1 = x
    AND field2 = y
    AND (
        (field3 = 1 AND field4 IN (4, 5, 6))      -- field3 = 1 and field4 has one of specified values
        OR                                        -- or alternatively
        (field3 = 0 AND field4 NOT IN (4, 5, 6))  -- field3 = 0 and field4 doesn't have any of the specified values
    )

修改实际上 - 再次阅读你的帖子后，你想要field4为4,5或6你想让field3为0或1 - 或者我错了？这意味着：

SELECT * FROM table WHERE field1 = x AND field2 = y AND field3 IN (0, 1) AND field4 IN (4, 5, 6))

如何只排除两个匹配的字段？

2 个答案: