如何在Laravel中发出查询？

我需要在Laravel中为图表创建查询

我需要创建这个json文件：

例如：（30天前）

我在Laravel的代码是：

 $date = Carbon::today()->subDays(30);
 $ordersChart = Order::selectRaw('dayname(created_at) day, count(*) count')
        ->where('created_at', '>=', $date)
        ->groupBy('day')
        ->latest()
        ->get();

但返回后，

$ordershart

显示此错误：

SQLSTATE[42000]: Syntax error or access violation: 1055 Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'laravel.orders.created_at' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by (SQL: select dayname(created_at) day, count(*) count from `orders` where `created_at` >= 2018-03-20 00:00:00 group by `day` order by `created_at` desc)

---

如何解决此问题？

您必须使用

->latest（'day'）

您必须使用：

1-

dayname（创建时间）

=>

day（创建时间）

2-

latest（）

=>

latest（'day'）

---

在config/database.php文件的mysql块中将strict模式设置为false，然后尝试查询

latest（）

means

orderBy（'updated_at'，'desc'）

每个组可能有多个updated at，这使得orderBy没有实际意义

SQLSTATE[42000]: Syntax error or access violation: 1055 Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'laravel.orders.created_at' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by (SQL: select dayname(created_at) day, count(*) count from `orders` where `created_at` >= 2018-03-20 00:00:00 group by `day` order by `created_at` desc)

$ordersChart = Order::selectRaw('day(created_at) day, count(*) count')
    ->where('created_at', '>=', $date)
    ->groupBy('day')
    ->latest('day')
    ->get();