Question

SELECT  * 
FROM    `people` 
WHERE   `Cars` BETWEEN '0' AND '1' 
AND     `Name` LIKE ('%George%') 
    OR  `Address` LIKE ('%George%') 
    OR  `City` LIKE ('%George%') 
ORDER BY Favorite DESC

目前，如果2 cars中有address个George或city为Georgetown，则会返回0人。

我怎样才能这样做只会让那些拥有1到OR辆汽车的人回来，他们的名字是乔治或乔治城镇？

所以我认为我使用了错误的{{1}}声明？但是我的声明很难改进。任何建议都很可爱。

Answer 1

您需要在parenthesis子句中使用where来正确过滤行。

在您的查询中，即使Cars不在0和1以及Address LIKE ('%George%')之间，也会返回该行，因为and运算符已应用仅在name和cars之间。

要避免这种情况，只需将parenthesis添加到OR运算符的列中即可。尝试此操作。

SELECT  * 
FROM    `people` 
WHERE   `Cars` BETWEEN '0' AND '1' 
AND     (`Name` LIKE ('%George%') 
    OR  `Address` LIKE ('%George%') 
    OR  `City` LIKE ('%George%')) 
ORDER BY Favorite DESC

Answer 2

您遇到的问题是and的优先级高于or。

您的查询被解释为：

SELECT  * 
FROM    `people` 
WHERE   (
            `Cars` BETWEEN '0' AND '1' 
            AND     `Name` LIKE ('%George%')
        ) 
        OR  `Address` LIKE ('%George%') 
        OR  `City` LIKE ('%George%')) 
        ORDER BY Favorite DESC

使用括号内的or子句更好地编写查询：

SELECT  * 
FROM    `people` 
WHERE   `Cars` BETWEEN '0' AND '1' 
AND     (
            `Name` LIKE ('%George%') 
            OR  `Address` LIKE ('%George%') 
            OR  `City` LIKE ('%George%')
        )
ORDER BY Favorite DESC

Answer 3

将()中的OR语句分组，以使其中一个必须为真：

SELECT  * 
FROM    `people` 
WHERE   `Cars` BETWEEN '0' AND '1' 
AND     (
        `Name` LIKE ('%George%') OR
        `Address` LIKE ('%George%') OR
        `City` LIKE ('%George%')
        )
ORDER BY Favorite DESC

Answer 4

显然没有。汽车不能是分数，所以应该用来检查0或1

SELECT  * 
FROM    `people` 
WHERE   `Cars` in(0,1) 
AND     (`Name` LIKE ('%George%') 
    OR  `Address` LIKE ('%George%') 
    OR  `City` LIKE ('%George%')) 
ORDER BY Favorite DESC

Answer 5

尝试添加“（）”：

SELECT  * 
FROM    `people` 
WHERE   `Cars` BETWEEN '0' AND '1' 
AND     (`Name` LIKE ('%George%') 
    OR  `Address` LIKE ('%George%') 
    OR  `City` LIKE ('%George%') )
ORDER BY Favorite DESC

Answer 6

如果您愿意，您只能获取一列，并且稍后可以添加更多数据。我的意思是添加名为＆＃34; search＆＃34;并抛出您想要的所有数据，并仅通过此搜索。

SELECT  * FROM    `people` 
WHERE   `Cars` BETWEEN '0' AND '1' 
AND     `search` LIKE ('%George%')
ORDER BY Favorite DESC

请记住，如果某些内容已更新，您需要更新＆＃34;搜索＆＃34;值也与新数据有关。

如何更好地改进此SQL查询？

6 个答案: