表：

人员表：t_sys_user

组织机构表：t_sys_organization

组织机构人员关系表：t_sys_user_organization

需求：传入一个组织机构id查询该机构下面所有的人员

SQL:

with recursive t as(
  SELECT * FROM t_sys_organization WHERE organization_id='150030595752464384'
  UNION ALL 
  SELECT c.* FROM t_sys_organization c JOIN t ON c.parent_id = t.organization_id
)
SELECT user.user_id
FROM t_sys_user user 
	JOIN t_sys_user_organization uo on user.user_id = uo.user_id
	JOIN t on t.organization_id = uo.organization_id

结果：