laravel增删改查（查询构建器）

1.增

$data = [
    'username' => 'xiaohong',
    'nickname' => '小红红',
    'email'    => '12356788@qq.com',
    'phone'    => '',
    'password' => md5(''),
    'login_status'=> ,
];
$res=DB::table('admins')->insertGetId($data);

2.删

$res=DB::table('admins')->whereIn('id',[,])->delete();

3.改

$data = [
          'nickname'=> '超级管理员',
          'email'   => 'itheima@qq.com',
        ];
$res = DB::table('admins')->where('username','=','root')->update($data);    

4.查

$where=[
    ['id','>',],
    ['id','<',],
];
$res=DB::table('admins')->where('nickname');