A.* 不在 laravel 查询生成器上左连接的 GROUP BY 中

Question

   $search_alls=
    DB::table('a16s as A')
    ->select('A.id')
    // ->select('A.*')
    ->addSelect(DB::raw('SUM(CASE WHEN B.approve = 1 ELSE 0 END) as Yshow'))
    ->leftjoin('a16s_likes as B', function($join) {
        $join->on('A.id', '=', 'B.p_id');
        })
    ->groupBy('A.id')
    ->get();

当我使用上面的 select('A.id') 时效果很好。

但是当我使用 select('A.*') 到 select all A cloumn 我收到错误

SQLSTATE[42000]: Syntax error or access violation: 1055 'employee.A.name' isn't in GROUP BY

PS:employee 是我的数据库名称 A table 上的列是

id name ....
1  john
2  mary
3  susan

我怎样才能 select 左连接的所有列？ A.id 列与 B.p_id 列是一对多关系。

Answer 1

使用 select('A.*') 到 select 所有列

 $search_alls=
    DB::table('a16s as A') 
    ->select('A.*')
    ->addSelect(DB::raw('SUM(CASE WHEN B.approve = 1 ELSE 0 END) as Yshow'))
    ->leftjoin('a16s_likes as B', function($join) {
        $join->on('A.id', '=', 'B.p_id');
        })
    ->groupBy('A.id')
    ->get();

Answer 2

您必须在 Laravel 应用程序中关闭严格模式。

转到config/database.php

下MySQL集

strict => false

它会开始工作。

希望对您有所帮助。

Answer 3

要解决此问题，您需要在 select 列表中指定所需的列并按子句分组

$search_alls=DB::table('a16s as A')
                ->select('A.id','A.name')
                ->addSelect(DB::raw('SUM(CASE WHEN B.approve = 1 ELSE 0 END) as Yshow'))
                ->leftjoin('a16s_likes as B', function($join) {
                    $join->on('A.id', '=', 'B.p_id');
                })
                ->groupBy('A.id')
                ->groupBy('A.name');
    ->get();

As per newer release mysql 5.7 does not permit queries for which the select list, HAVING condition, or ORDER BY list refer to nonaggregated columns that are not named in the GROUP BY clause

12.19.3 MySQL Handling of GROUP BY

根据文档

MySQL 5.7.5 and up implements detection of functional dependence. If the ONLY_FULL_GROUP_BY SQL mode is enabled (which it is by default), MySQL rejects queries for which the select list, HAVING condition, or ORDER BY list refer to nonaggregated columns that are neither named in the GROUP BY clause nor are functionally dependent on them. (Before 5.7.5, MySQL does not detect functional dependency and ONLY_FULL_GROUP_BY is not enabled by default

Answer 4

我详细看到了你的问题。我也遇到过同样的问题。在database.php中，有以下设置

'mysql' => [
            'driver' => 'mysql',
            'url' => env('DATABASE_URL'),
            'host' => env('DB_HOST', '127.0.0.1'),
            'port' => env('DB_PORT', '3306'),
            'database' => env('DB_DATABASE', 'forge'),
            'username' => env('DB_USERNAME', 'forge'),
            'password' => env('DB_PASSWORD', ''),
            'unix_socket' => env('DB_SOCKET', ''),
            'charset' => 'utf8mb4',
            'collation' => 'utf8mb4_unicode_ci',
            'prefix' => '',
            'prefix_indexes' => true,
            'strict' => false,
            'engine' => null,
            'options' => extension_loaded('pdo_mysql') ? array_filter([
                PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
            ]) : [],
        ],

当我将 strict 属性设置为 false 时，它起作用了，我已经解决了问题。

A.* 不在 laravel 查询生成器上左连接的 GROUP BY 中

A.* isn't in GROUP BY with left join on laravel query builder

mysql

group-by

left-join

laravel

laravel-query-builder