/**所有子节点列表*/
delimiter // 
CREATE FUNCTION `getChildList`(rootId varchar(100))   
RETURNS varchar(2000)  
BEGIN   
DECLARE str varchar(2000);  
DECLARE cid varchar(100);   
SET str = '$';   
SET cid = rootId;   
WHILE cid is not null DO   SET str = concat(str, ',', cid);   SELECT group_concat(id) INTO cid FROM t_base_department where FIND_IN_SET(parent_id, cid) > 0;   
END WHILE;   
RETURN str;   
END  
///**所有父节点列表*/
delimiter // 
CREATE FUNCTION `getParentList`(rootId varchar(100))   
RETURNS varchar(1000)   
BEGIN   
DECLARE fid varchar(100) default '';   
DECLARE str varchar(1000) default rootId;   WHILE rootId is not null  do   SET fid =(SELECT parent_id FROM t_base_department WHERE id = rootId);   IF fid is not null THEN   SET str = concat(str, ',', fid);   SET rootId = fid;   ELSE   SET rootId = fid;   END IF;   
END WHILE;   
return str;  
END  
//执行：select * from t_base_employee where depart_id in (select id from t_base_department where FIND_IN_SET(id,getChildList('201732014041505768')));结果：select * from t_base_employee where depart_id in (select id from t_base_department where FIND_IN_SET(id,getParentList('201732014041505768')));
结果：

原文地址:https://blog.csdn.net/u014033756/article/details/70567746