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问答 2016-02-27 来自：开发者社区

数据库中有两张表booktype 和bookinfobooktype表parentid 中是0 的是一级类别，其他值对应booktypeid如“中国现代文学”的parentid =1，它就是"文学"下面类别，再如 "四大名著"的parentid=3，它就是"小说"下面的类别；bookinfo表数据有点少，但是可以用 "西游记"和"水浒传"的booktypeid=4，所以他俩是booktyp....

问答 2016-02-14 来自：开发者社区

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问答 2016-02-14 来自：开发者社区

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问答 2016-02-14 来自：开发者社区

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问答 2016-02-14 来自：开发者社区

mysql 查询本周生日的会员，如何写sql语句？

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