在 MySQL 8 中，in 条件用于多个字段，查询结果为空的排查
1、在 MySQL 8 中，in 条件用于多个字段，查询结果为空。如图1
2、参考：在 MySQL 8 中，in 条件用于多个字段 查询结果不为空的 SQL 如下3、参考：在 Laravel 9 中使用原生表达查询时，报错：SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; 调整代码，打印绑定参数，符合预期，没有问题。如图2![参考：在 Laravel 9 中使用原生表达查询时，报错：SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax;](data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%20924%20515'%3E%3C/svg%3E)
4、调整代码实现如下5、运行时报错：SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘? order by `id` desc’ at line 1 。如图3![运行时报错：SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '? order by `id` desc' at line 1 。](data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%201411%20417'%3E%3C/svg%3E)
6、但是，将报错的 SQL 复制到数据库中，手动执行，执行成功。如图4
7、调整代码实现如下，运行时报错：SQLSTATE[21000]: Cardinality violation: 1241 Operand should contain 2 column(s) 。但是，将报错的 SQL 复制到数据库中，手动执行，执行成功。如图5![调整代码实现如下，运行时报错：SQLSTATE[21000]: Cardinality violation: 1241 Operand should contain 2 column(s) 。但是，将报错的 SQL 复制到数据库中，手动执行，执行成功](data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%201414%20417'%3E%3C/svg%3E)
8、最终决定放弃此 SQL，调整为另外一种 SQL 格式。代码实现如下，生成 SQL 如下，程序运行时不再报错，查询结果符合预期。如图6
图1
SELECT
`id`,
`name`,
`email`,
`type`
FROM
`customers`
WHERE
( 'name,email' ) IN ( '(\'客户姓名二\',\'44445@163.com\'),(\'客户姓名\',\'44445@163.com\')' )
ORDER BY
`id` DESC
SELECT * FROM `customers` WHERE ( NAME, email ) IN (( '123', '123@outlook.com' ),
( '我是客户姓名33', '1303842899@qq.com' ))
![参考：在 Laravel 9 中使用原生表达查询时，报错：SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax;](https://www.shuijingwanwq.com/wp-content/uploads/2024/06/2.png)
图2
$str = '';
foreach ($criteria['whereRawIn'][1] as $key => $customer) {
$str .= ($key == 0) ? '(\'' : ',(\'';
$str .= implode('\',\'', $customer) . '\')';
}
var_dump($criteria['whereRawIn'][0]);
var_dump($str);
exit;
string(10) "name,email"
string(2959) "('客户姓名二','44445@163.com'),('客户姓名','44445@163.com')"
$str = '';
foreach ($criteria['whereRawIn'][1] as $key => $customer) {
$str .= ($key == 0) ? '(\'' : ',(\'';
$str .= implode('\',\'', $customer) . '\')';
}
// var_dump('(' . $criteria['whereRawIn'][0] . ')');
// var_dump('(' . $str . ')');
// exit;
$builder->whereRaw('? in ?', ['(' . $criteria['whereRawIn'][0] . ')', '(' . $str . ')']);
![运行时报错：SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '? order by `id` desc' at line 1 。](https://www.shuijingwanwq.com/wp-content/uploads/2024/06/3.png)
图3
图4
![调整代码实现如下，运行时报错：SQLSTATE[21000]: Cardinality violation: 1241 Operand should contain 2 column(s) 。但是，将报错的 SQL 复制到数据库中，手动执行，执行成功](https://www.shuijingwanwq.com/wp-content/uploads/2024/06/5.png)
图5
$str = '';
foreach ($criteria['whereRawIn'][1] as $key => $customer) {
$str .= ($key == 0) ? '(\'' : ',(\'';
$str .= implode('\',\'', $customer) . '\')';
}
// var_dump('(' . $criteria['whereRawIn'][0] . ')');
// var_dump('(' . $str . ')');
// exit;
// $builder->whereRaw('? in ?', ['(' . $criteria['whereRawIn'][0] . ')', '(' . $str . ')']);
$builder->whereRaw('(?,?) in (?)', ['name', 'email', $str]);
// $builder->whereRaw('( ' . $criteria['whereRawIn'][0] . ' ) in (?)', [$str]);
图6
foreach ($criteria['names_emails'] as $customer) {
$builder->orWhere(function ($query) use ($customer) {
$query->where('name', $customer[0])
->where('email', $customer[1]);
});
}
SELECT
`id`,
`name`,
`email`,
`type`
FROM
`customers`
WHERE
( `name` = '客户姓名二' AND `email` = '客户姓名二' )
OR ( `name` = '客户姓名' AND `email` = '客户姓名' )
ORDER BY
`id` DESC
