According to the SQL Standard, the method to evaluate hierarchical or bi-directional data is the Recursive Common Table Expression (RCTE).

根据SQL标准，评估分层或双向数据的方法为递归通用表表达式(RCTE)。

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The most common reason is the need to feed legacy SQL applications, packaged business applications and business intelligence (BI) tools that consume only relational data.

最常见的原因是需要向仅使用关系数据的遗留 SQL 应用程序、打包业务应用程序和商业智能 (BI) 工具馈送数据。

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If you want to use standard SQL and BI reporting tools, pick shred.

如果想使用标准的SQL和BI报告工具，选择分解。

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