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51CTO
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十个高级的 SQL 查询技巧-51CTO.COM
2.递归CTEs. 递归CTE是引用自己的CTE,就像Python中的递归函数一样。 递归CTE尤其有用,它涉及查询组织结构图,文件系统,网页之间的链接图等的分层数据,尤其有用。 递归CTE有3个部分: 锚构件:返回CTE的基本结果的初始查询 递归成员:引用CTE的递归查询。
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