mysql查所有下级

//向下递归包含本级

WITH RECURSIVE cte AS (
  SELECT * FROM live_usr_config WHERE supid="lNy5ZNI3WZ3QXSopb0mdr"
  UNION ALL
  SELECT d.* FROM live_usr_config d INNER JOIN cte ON d.supid = cte.subid
)
SELECT * FROM cte;

//向下递归包含本级并限制次数为下两层

WITH RECURSIVE cte (subid, level) AS (
  SELECT subid, 1
  FROM live_usr_config
  WHERE supid="lNy5ZNI3WZ3QXSopb0mdr"
  UNION ALL
  SELECT o.subid, cte.level + 1
  FROM live_usr_config o
  INNER JOIN cte ON o.supid = cte.subid
  WHERE level < 2
)
SELECT * FROM cte ORDER BY subid;

参考网站：https://www.python100.com/html/7U3P24ALVZ73.html