sql 如何递归查询层级数据将父级字段和本级某个字段合并

with cte_child(id,areaName,pid)
as
(

--起始条件
select id,areaName,pid from erp_area
where id = 44 --列出子节点查询条件

union all

--递归条件

select a.id,a.areaName,a.pid
from erp_area a
inner join
cte_child b --执行递归
on a.id=b.pid
)
select * from cte_child;

//如何递归查询层级数据将父级字段和本级某个字段合并
select stuff((
select '--'+subjectname
from cte_child order by subjectid desc for xml path('')),1,0,'') as subjectname ;

标签：层级,父级,--,child,pid,cte,sql,id,select
来源： https://www.cnblogs.com/lhr518/p/16494553.html