Oracle Apex 树子节点多次返回

Question

我有一个 3 层的 apex 树：（Apex 版本 22.1）

BU_NAME ORG_UNIT_NAME 部门名称

Source Table:

DEPT_BU_LIST

DEPT_ID BU_NAME ORG_UNIT_NAME   DEPT_NAME
1        A_BU   AX_ORG          A1_DEPT
2        B_BU   BX_ORG          A2_DEPT
3        C_BU   CX_ORG          A3_DEPT
4        C_BU   CX_ORG          A4_DEPT


CREATE TABLE DEPT_BU_LIST 
( DEPT_ID NOT NULL ENABLE,
BU_NAME VARCHAR2(100), ORG_UNIT_NAME VARCHAR2(100), DEPT_NAME VARCHAR2(100));


INSERT INTO DEPT_BU_LIST VALUES
(1,'A_BU','AX_ORG','A1_DEPT');
INSERT INTO DEPT_BU_LIST VALUES
(1,'B_BU','AY_ORG','A1_DEPT');
INSERT INTO DEPT_BU_LIST VALUES
(1,'C_BU','CX_ORG','A3_DEPT');
INSERT INTO DEPT_BU_LIST VALUES
(1,'C_BU','CX_ORG','A4_DEPT');

当我在 apex 中执行以下查询时，前 2 个级别正确显示数据，但 dept_name 值重复。

例如：

A_BU
AX_ORG
A1_DEPT
A2_DEPT

B_BU
AY_ORG
A1_DEPT
A2_DEPT

即使在直通表中A_BU有A_DEPT并且B_BU有B1_DEPT分配。 它显示的数据如上。

    SELECT case WHEN connect_by_isleaf = 1 THEN 0 
                WHEN level = 1 THEN 1 
    ELSE -1 
    END               status,
     level                 "level",
    display                name,
    null as icon, 
     id                     id,
    tooltip                tooltip,
    link                   link
     FROM (
     SELECT bu_name
     display,
    , null               pid
    , bu_name               id
    , 1                  "level"
     , 'javascript:$s(''P1_SELECTED_NODE'', 
     '''||bu_name||'||||'||''')'                          
    link
    , null               tooltip 
    FROM (SELECT bu_name             bu_name   
    , org_unit_name               org_unit_name
    , dept_name         dept_name
     , count(1)                 error_count
     FROM dept_bu_list
     GROUP BY
    bu_name
    , org_unit_name
    ,dept_name
     ) e
    GROUP BY 
    bu_name
     UNION ALL       
    SELECT org_unit_name
    display,
    , bu_name               pid
     , org_unit_name            id
    , 2                  "level"
     , 'javascript:$s(''P1_SELECTED_NODE'', '''||bu_name||'|'||org_unit_name||'|||'||''')'                          
    link
    , null               tooltip 
    FROM (SELECT bu_name             bu_name   
    , org_unit_name               org_unit_name
     , dept_name         dept_name
    , count(1)                 error_count
    FROM dept_bu_list
    GROUP BY
    bu_name
    , org_unit_name
    ,dept_name
     ) e
     GROUP BY 
    bu_name
    , org_unit_name
     UNION ALL       
    SELECT dept_name 
    display,
   , org_unit_name                 pid
     , dept_name     id
    , 3                  "level"
     , 'javascript:$s(''P1_SELECTED_NODE'', '''||bu_name||'|'||org_unit_name||'|'||dept_name||'||'||''')'                          
    link
    , null               tooltip 
    FROM (SELECT bu_name             bu_name   
    , org_unit_name               org_unit_name
    , dept_name         dept_name
    , count(1)                 error_count
     FROM dept_bu_list
     GROUP BY
    bu_name
    , org_unit_name
    ,dept_name
     ) e
    GROUP BY 
    bu_name
    , org_unit_name
    
          , dept_name
   )
   START WITH pid IS NULL
  CONNECT BY PRIOR id = pid
   ORDER SIBLINGS BY display

请帮忙解决这个问题..我想我在第 3 级缺少一些东西，它返回所有 dept_name 值

Answer 1

不清楚您期望示例数据的输出是什么，但您似乎想要显示层次结构。为此，您可以

UNPIVOT

您的数据并删除重复项，然后使用分层查询将其重建为树结构：

SELECT child, depth
FROM   (
  SELECT DISTINCT parent, child, depth
  FROM   (SELECT d.*, NULL AS root FROM DEPT_BU_LIST d)
         UNPIVOT (
           (parent, child) FOR depth IN (
             (root, bu_name) AS 1,
             (bu_name, org_unit_name) AS 2,
             (org_unit_name, dept_name) AS 3
           )
         )
)
START WITH DEPTH = 1
CONNECT BY PRIOR child = parent
AND        PRIOR depth + 1 = depth
ORDER SIBLINGS BY child

对于样本数据：

ALTER SESSION SET NLS_DATE_FORMAT = 'YYYY-MM-DD HH24:MI:SS';

CREATE TABLE DEPT_BU_LIST (
  DEPT_ID       NUMBER PRIMARY KEY NOT NULL ENABLE,
  BU_NAME       VARCHAR2(100),
  ORG_UNIT_NAME VARCHAR2(100),
  DEPT_NAME     VARCHAR2(100)
);

BEGIN
INSERT INTO DEPT_BU_LIST VALUES (1,'A_BU','AX_ORG','A1_DEPT');
INSERT INTO DEPT_BU_LIST VALUES (2,'B_BU','AY_ORG','A1_DEPT');
INSERT INTO DEPT_BU_LIST VALUES (3,'C_BU','CX_ORG','A3_DEPT');
INSERT INTO DEPT_BU_LIST VALUES (4,'C_BU','CX_ORG','A4_DEPT');
END;
/

输出：

孩子	深度
A_BU	1
AX_ORG	2
A1_部门	3
B_BU	1
AY_ORG	2
A1_部门	3
C_BU	1
CX_ORG	2
A3_部门	3
A4_部门	3

小提琴