//插入数据

        $res = Db::execute('insert into phptab(info) values("小张")');

        dump($res);

        //修改数据

        $res = Db::execute('update phptab set info="你好tp" where id=1');

        //删除数据

        $res = Db::execute('delete from phptab where id=1');

        //查询数据

        $res = Db::query('select * from phptab');

        dump($res);

        // // 防注入操作

        $res = Db::execute('insert into phptab(info) values(:info)', ['info' => '你好tp']);

        $res = Db::execute('insert into phptab(info) values(?)', ["不太好"]);

        // PDO插入

        $res = Db::table('phptab')->insert(['info' => '哈哈哈']);

        // 更新

        $res = Db::table('phptab')->where('id', 2)->update(['info' => '迪迦']);

        $res = Db::table('phptab')->select();

        $res = Db::table('phptab')->where('id', 5)->delete();

        $db = Db::table('phptab');

        $res = $db->insert(['info' => '哈哈哈']);

        $res = Db::name('phptab')->insert(['info' => '哈哈哈']);

        //统计数量count

        $res = $db->count('info');

        dump($res);

        return 1;