laravel数据库操作

DB::connection('foo')->select(...);

$pdo = DB::connection()->getPdo();

 $users = DB::select('select * from users where active = ?', [1]);
 $users =  DB::select('select * from users where id = :id', ['id' => 1]);

DB::insert('insert into users (id, name) values (?, ?)', [1, 'Dayle']);

DB::update('update users set votes = 100 where name = ?', ['John']);

DB::delete('delete from users');


DB::statement('drop table users');

DB::transaction(function () {
    DB::table('users')->update(['votes' => 1]);

    DB::table('posts')->delete();
});


//手动使用事务
DB::beginTransaction();
DB::rollBack();
DB::commit();