2,查询构造器[Query Builder] 1.查询所有$data= DB::table('user')->get();2.查询所有,并指定字段 推荐使第一种方式$data= DB::table("user名")->select("name", "email")->get();$data= DB::table("user名") ->select(DB::raw('count(id) as count'),
'connections' =>['sqlite' =>['driver' => 'sqlite', 'database' => env('DB_DATABASE', database_path('database.sqlite')), 'prefix' => '',], 'mysql' =>['driver' => 'mysql', 'host' => env('DB_HOST', '127.0.0.1'), 'port' => env('DB_PORT', '3306'), 'database' ...
1DB::table('users')->delete();Truncating A Table1DB::table('users')->truncate();UnionsThe query builder also provides a quick way to "union" two queries together:1$first = DB::table('users')->whereNull('first_name'); 2 3$users = DB::table('users')->whereNull('last_name')...
The query builder also provides a convenient method to "union" two or more queries together. For example, you may create an initial query and use the union method to union it with more queries:use Illuminate\Support\Facades\DB; $first = DB::table('users') ->whereNull('first_name'); ...
Connection 对象执行table方法返回了一个 QueryBuilder 对象,接下来所有数据库 CURD 都有 QueryBuilder 提供。 接下来我们看简单查询语句 $users = DB::table('users')->where('votes', 100)->get(); 在 QueryBuilder 是怎么执行 : namespaceIlluminate\Database\Query;...classBuilderimplementsBuilderContract...
数据库查询构造器 (query builder) 提供方便、流畅的接口,用来建立及执行数据库查找语法。在你的应用程序里面,它可以被使用在大部分的数据库操作,而且它在所有支持的数据库系统上都可以执行。 注意 Laravel 查询构造器使用 PDO 参数绑定,以保护应用程序免于 SQL 注入,因此传入的参数不需额外转义特殊字符。
You may use the table method on the DB facade to begin a query. The table method returns a fluent query builder instance for the given table, allowing you to chain more constraints onto the query and then finally get the results using the get method:...
Route::get('/query_builder',function(){// Query Builder// (new MySqlConnection)->table('users')->where('id', '=', 1)->get();returnDB::table('users')->where('id','=',1)->get();}); 这里已经拿到了MySqlConnection对象,看下其table()的源码: ...
DB::table('users') ->where('name', '=', 'John') ->orWhere(function ($query) { $query->where('votes', '>', 100) ->where('title', '<>', 'Admin'); }) ->get();如你所见,上面例子会将闭包传入orWhere 方法,以告诉查询语句构造器开始一个约束分组。此闭包接收一个查询语句构造器的...
查询构建器(Query Builder) 1、新增数据 使用查询构建器的insert方法即可插入一条/多条数据: DB::table('users')->insert([ ['id'=>1,'name'=>'Laravel','email'=>'laravel@','password'=>'123'], ['id'=>2,'name'=>'Academy','email'=>'academy@','password'=>'123'], ...