反转“With Recursive”语句

Question

我有 ff。查询以显示 Director's Hierarchy 下的任何人：

 WITH RECURSIVE emptree AS (
         SELECT e.win_id,
            e.full_name,
            e.current_sup_name,
            e.sbu,
            e.cost_center,
            e.lob,
            0 AS depth
           FROM app_reports.vw_hiearchy e
          WHERE e.win_id = xxxxxxx AND e.attrition_date IS NULL
        UNION ALL
         SELECT e.win_id,
            e.full_name,
            e.current_sup_name,
            e.sbu,
            e.cost_center,
            e.lob,
            t.depth + 1 AS depth
           FROM app_reports.vw_hiearchy e
             JOIN emptree t ON t.win_id = e.current_sup_win
          WHERE e.attrition_date IS NULL
        )
 SELECT emptree.win_id,
    emptree.full_name,
    emptree.current_sup_name,
    emptree.sbu,
    emptree.cost_center,
    emptree.lob,
    emptree.depth
   FROM emptree;

在我被要求添加另一列（或更多列）以显示谁是特定主管的主管之前，它工作正常（技术上动态添加列 - 如果可能，从下往上显示所有主管）。我不确定它是否涉及扭转这一点，以便我真正从下到上获取层次结构并将其显示为 current_sup_name_2、current_sup_name3 等等。但我不确定如何。

提前感谢您的任何建议。 :)

Answer 1

应该可以在单个字段中显示主管的完整层次结构，只需对现有查询进行少量修改：

WITH RECURSIVE emptree AS (
         SELECT e.win_id,
            e.full_name,
            e.current_sup_name,
            e.sbu,
            e.cost_center,
            e.lob,
            0 AS depth
           FROM app_reports.vw_hiearchy e
          WHERE e.win_id = xxxxxxx AND e.attrition_date IS NULL
        UNION ALL
         SELECT e.win_id,
            e.full_name,
            concat_ws(',', e.current_sup_name, t.current_sup_name) current_sup_name,
            e.sbu,
            e.cost_center,
            e.lob,
            t.depth + 1 AS depth
           FROM app_reports.vw_hiearchy e
             JOIN emptree t ON t.win_id = e.current_sup_win
          WHERE e.attrition_date IS NULL
        )
 SELECT emptree.win_id,
    emptree.full_name,
    emptree.current_sup_name,
    emptree.sbu,
    emptree.cost_center,
    emptree.lob,
    emptree.depth
   FROM emptree;