我需要子节点的所有父节点的列表

Question

我的SQL数据

text/html

我尝试过的SQL查询

+----+------------+-------------+
| id | member_id  | refrence_id |
+----+------------+-------------+
|  1 | M3PL1234   | Admin       |
|  2 | M3PL368182 | M3PL1234    |
|  3 | M3PL532935 | M3PL368182  |
|  4 | M3PL846330 | M3PL1234    |
|  5 | M3PL611743 | M3PL368182  |
|  6 | M3PL157382 | M3PL611743  |
|  7 | M3PL590169 | M3PL532935  |
|  8 | M3PL687435 | M3PL532935  |
|  9 | M3PL318809 | M3PL846330  |
| 10 | M3PL334477 | M3PL846330  |
| 11 | M3PL481196 | M3PL611743  |
| 12 | M3PL297917 | M3PL157382  |
+----+------------+-------------+

我得到的结果：

select distinct( refrence_id ) from (select * from member_profile)
products_sorted, (select @pv :='M3PL611743') initialisation where 
length(@pv := concat(@pv, ',',member_id))
and find_in_set(refrence_id, @pv) ;

结果应该是。

+-------------+
| refrence_id |
+-------------+
| M3PL1234    |
| M3PL368182  |
| M3PL611743  |
| M3PL532935  |
| M3PL846330  |
| M3PL157382  |
| M3PL590169  |
| M3PL687435  |
+-------------+

Answer 1

请考虑以下内容：

邻接表模型：

DROP TABLE IF EXISTS my_table;

CREATE TABLE my_table
(member_id INT NOT NULL PRIMARY KEY
,parent INT NULL
);

INSERT INTO my_table VALUES
(234,NULL),
(182,234),
(935,182),
(330,234),
(743,182),
(382,743),
(169,935),
(435,935),
(809,330),
(477,330),
(196,743),
(917,382);


SELECT y.member_id parent
     , z.member_id granparent 
  FROM my_table x 
  LEFT 
  JOIN my_table y 
    ON y.member_id = x.parent 
  LEFT 
  JOIN my_table z 
    ON z.member_id = y.parent 
 WHERE x.member_id = 743;
+--------+-------------+
| parent | grandparent |
+--------+-------------+
|    182 |         234 |
+--------+-------------+

...或嵌套集模型：

DROP TABLE IF EXISTS my_nested_set;

CREATE TABLE my_nested_set
(member_id INT NOT NULL PRIMARY KEY
, lft INT NOT NULL
, rgt INT NOT NULL
);

INSERT INTO my_nested_set VALUES
(234      ,   1, 24),
(182      ,   2, 17),
(935      ,   3,  8),
(435      ,   4,  5),
(169      ,   6,  7),
(743      ,   9, 16),
(382      ,  10, 13),
(917      ,  11, 12),
(196      ,  14, 15),
(330      ,  18, 23),
(809      ,  19, 20),
(477      ,  21, 22);

SELECT x.member_id 
  FROM my_nested_set x 
  JOIN my_nested_set y 
    ON y.lft > x.lft 
   AND y.lft < x.rgt 
 WHERE y.member_id = 743;
+-----------+
| member_id |
+-----------+
|       182 |
|       234 |
+-----------+