Laravel Eloquent 'WITH'语句查询是一种在Laravel框架中使用Eloquent ORM进行数据库查询的方法。'WITH'语句允许我们在一次查询中预加载关联模型的数据,以避免N+1查询问题,提高查询性能。 优势: 减少数据库查询次数:通过使用'WITH'语句,我们可以在一次查询中同时获取主模型和关联模型的数据,避免了多次查询数据库的情况,...
foreach ($posts as $post) { echo $post->comments_count; } 这样,我们就可以在Laravel中使用withCount方法并添加条件来获取关联模型的数量了。 推荐的腾讯云相关产品:腾讯云服务器(CVM)和腾讯云数据库(TencentDB)。 腾讯云服务器(CVM)是一种弹性计算服务,提供可扩展的云服务器实例,适用于各种应用场景。您可以...
select * from `users` where ( select count(*) from `posts` where `users`.`id` = `posts`.`user_id` and `posts`.`deleted_at` is null ) > 1 and `email_verified_at` is not null 你甚至还可以通过嵌套关联查询的方式过滤发布的文章有评论的用户:Copy Highlighter-hljs$users = User::has...
->select('posts.*', 'users.name', 'users.email') ->get(); # 当两张表有字段名相同的字段并被select指定时,要区别名 select('posts.*', 'users.name as username', 'users.email') # 左连接 $posts = DB::table('posts') ->leftJoin('users', 'users.id', '=', 'posts.user_id') -...
With the result of: Unknown column 'name' in 'where clause' (SQL: select count(*) as aggregate from `actions` where `site_id` = 555 or (priority LIKE '%Medium%') or (status LIKE '%Medium%') or (name LIKE '%Medium%') or (actionType LIKE '%Medium%')...
在这里,我将在addselect查询whereRaw中添加$product_id条件,但它的show error添加了两个错误屏幕截图。 $product_id条件对于欲望输出是必需的。在whereRaw上有没有其他方法来传递product_id条件 我不知道这里发生了什么 public function viewOrder($product_id) ...
select_type type key rows Extra SIMPLE Range idx_marktime 2370258 Using index condition; Using where 实际上的sql是这样的: 1 select * from `tabel` where `type` = 99 and mark_time between :begin_date and :end_date order by id limit 500; ...
1 Get Count in mysql query in laravel 1 Laravel DB query with count 0 Laravel : How to count in query 0 Count records by users in laravel 5.4 1 Query with select and count in laravel 0 How to COUNT Column and use WHERE condition by each ID(user) with Laravel Fluent? 0...
* @return response() */ publicfunctionindex(Request$request) { $users=User::select("users.*","items.id as itemId","jobs.id as jobId") ->join("items","items.user_id","=","users.id") ->join("jobs",function($join){ $join->on("jobs.user_id","=","users.id") ...
$users = DB::table('users') ->select(DB::raw('count(*) as user_count, status')) ->where('status', '<>', 1) ->groupBy('status') ->get();Raw statements will be injected into the query as strings, so you should be extremely careful to avoid creating SQL injection vulnerabilities...