Question

我想在laravel 5之后构建查询

SELECT * FROM tbl WHERE updated_at IN (
   SELECT max(updated_at) FROM tbl
   WHERE created_at BETWEEN $begin_time AND $end_time 
   GROUP BY ip_address)

我的代码：

$sqlStr = self::select('*')
        ->whereIn('updated_at', function($query){
                         return $query->select(self::raw('max(updated_at)'))
                             ->whereRaw('created_at >= $begin_time)
                             ->whereRaw('created_at <= $end_time)
                             ->groupBy('ip_address');
})->toSql();
var_dump(($sqlStr));die;

错误信息：

Grammar.php第58行中的ErrorException：
strtolower（）期望参数1为字符串，给定对象

请帮帮我。

Answer 1

当您编写生成self::raw('max(updated_at)') SELECT max(updated_at) FROM tbl的{{1}}时，它已经在select命令中。以下代码将起作用：

$sqlStr = self::select('*')
    ->whereIn('updated_at', function($query) {
        $query->selectRaw('max(updated_at)')
            ->from('tbl')
            ->whereRaw('created_at >= $begin_time')
            ->whereRaw('created_at <= $end_time')
            ->groupBy('ip_address');
})->toSql();

Answer 2

或者这也应该有效：

DB::select(
    'SELECT * FROM tbl WHERE updated_at IN (' .
        'SELECT max(updated_at) FROM tbl ' .
        'WHERE created_at BETWEEN :begin_time AND :end_time ' .
        'GROUP BY ip_address '
    ')',
    [
        'begin_time' => $begin_time,
        'end_time' => $end_time
    ]
);

在laravel 5中构建复杂查询

2 个答案: