在Laravel中,"order by"是一种用于对查询结果进行排序的语句。当需要按照自定义日期字段进行排序时,可以使用Laravel的日期访问器和查询构建器来实现。 首先,确保在数据库表中有一个包含日期的字段。假设我们有一个名为"orders"的表,其中包含一个名为"custom_date"的自定义日期字段。 在Laravel模型中,可以使用日期访...
分页器的使用方式不正确:在使用分页器时,需要确保orderBy语句位于查询语句之前,以确保正确的排序。例如,以下代码展示了正确的使用方式: 代码语言:txt 复制$items = DB::table('table_name') ->orderBy('date_column', 'desc') ->paginate(10); 查询语句中的日期字段不正确:确保orderBy语句中的日期字段...
OrderDate, (SELECT MAX(OrdDet.UnitPrice) FROM Sales.SalesOrderDetail AS OrdDet WHERE Ord.SalesOrderID = OrdDet.SalesOrderID) AS MaxUnitPrice FROM Sales.SalesOrderHeader AS Ord; GO Laravel 中的写法 构建raw 语句 DB::raw 用于在查询中使用原始表达式。不仅限于 raw,也包括下述其他方法: selectRaw ...
function ($query) use ($opts) { switch ($opts['timeOrder']){ case 1: return $query->orderBy('indate','asc'); break; case 2: return $query->orderBy('indate','desc'
。。使用mysql的“convert\u tz”函数将时区设置更改为utc：
自定义属性custom_date,返回return date('Y-m-d', intval($value)); 当我需要返回指定格式的日期时,我就在对应的model,设置属性为custom_date就可以了。 <?phpnamespace App\Model;use App\Library\Utility;use Illuminate\Database\Eloquent\Model;class CustomModel extends Model{...protected function castAtt...
的字段,否则数据查询不到,如本例(device_id,device_field_id) 如:$query->select("device_id,device_field_id")$query->selectRaw("DATE_FORMAT(created_at, '%Y-%m-%d %H:%i') as date, id,device_id,device_field_id,name,created_at");$query->groupBy('date');$query->orderBy('date', '...
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$books->load(['author' => function ($query) { $query->orderBy('published_date', 'asc'); }]);Inserting & Updating Related ModelsThe Save MethodEloquent provides convenient methods for adding new models to relationships. For example, perhaps you need to insert a new Comment for a Post ...
In order to ensure that the Laravel community is welcoming to all, please review and abide by the Code of Conduct. Security Vulnerabilities Please review our security policy on how to report security vulnerabilities. License The Laravel framework is open-sourced software licensed under the MIT licen...