獲取所有上級(jí)節(jié)點(diǎn)(包含自身)
SELECT
group_concat(T1._id) as id
FROM
(
SELECT
@r AS _id,
( SELECT @r := parent_id FROM table_name WHERE id = _id ) AS parent_id,
@l := @l + 1 AS lvl
FROM
( SELECT @r := 1243380158908596224 id, @l := 0 ) vars,
table_name h
WHERE
@r <> 0
) T1
JOIN table_name T2 ON T1._id = T2.id
ORDER BY
T1.lvl DESC
獲取所有下級(jí)節(jié)點(diǎn)(包含自身)
SELECT
group_concat( T1._id ) AS id
FROM
(
SELECT
@r AS _id,
( SELECT @r := group_concat( t.id ) FROM table_name t WHERE FIND_IN_SET ( t.parent_id, _id ) ) AS parent_id,
@l := @l + 1 AS lvl
FROM
( SELECT @r := 1243380097210384384, @l := 0 ) vars,
table_name h
WHERE
@r > 0
) T1
