SQL INSERT INTO SELECT 语句

　　+----+--------------+---------------------------+-------+---------+

　　| id | name | url | alexa | country |

　　+----+--------------+---------------------------+-------+---------+

　　| 1 | Google | https://www.google.cm/ | 1 | USA |

　　| 2 | 淘宝 | https://www.taobao.com/ | 13 | CN |

　　| 3 | 菜鸟学堂 | http://edu.jb51.net/ | 1689 | CN |

　　| 4 | 微博 | http://weibo.com/ | 20 | CN |

　　| 5 | Facebook | https://www.facebook.com/ | 3 | USA |

　　| 7 | stackoverflow | http://stackoverflow.com/ | 0 | IND |

　　+----+---------------+---------------------------+-------+---------+