## 删除数据
~~~
// 条件删除
Db::name('user')->where('id',1)->delete();
Db::name('user')->where('id','<',10)->delete();
~~~
最终生成的SQL语句可能是：
~~~
DELETE FROM `og_user` WHERE `id` = 1
DELETE FROM `og_user` WHERE `id` < 10
~~~
>也可以在最后加删除条件：
~~~
Db::name('user')->where('id','<',10)->delete(['addtime' => 1520]);
~~~
实际生成的SQL语句可能是：
~~~
DELETE FROM `og_user` WHERE `id` < 10 AND `iaddtime` =1520
~~~
