php - Laravel 中的计数函数机制

Question

假设我们有这段代码

count()函数的结果是关于每个查询或查询后的结果 执行 then count 函数返回结果？

$model=Model::query()

foreach ($Entities as $entity) {
               $model->orWhereBetween("id",$entity->first_id,$entity->last_id])
         }
$model->count()

Answer 1

$model=Model::query()

    foreach ($Entities as $entity) {
        $model->orWhereBetween("id",$entity->first_id,$entity->last_id])
    }

//$model - object of query builder
$model->count();

它将生成一个查询并在数据库端进行计算:SELECT COUNT(*) FROM table WHERE id BETWEEN ?和 ？或 id 之间？和 ？或 id 之间？和？