mysql语句实现递归查询树节点的祖籍列表
SELECT T2.id, T2.SYSTEM_NAME
FROM (
SELECT
@r AS _id,
(SELECT @r := parent_id FROM T_BUSI_SYSTEM WHERE id = _id) AS parent_id,
@l := @l + 1 AS lvl
FROM
(SELECT @r := '065efb0ee********', @l := 0) vars,
T_BUSI_SYSTEM h WHERE @r <> 0
) T1
JOIN T_BUSI_SYSTEM T2 ON T1._id = T2.id
ORDER BY T1.lvl DESC