SQLSERVER的递归

Posted 2020-10-27 沈阳晓东

        实际项目如遇到按照如地区这样树状结构的条件递归查询数据的场景中，可以使用。

CREATE FUNCTION [dbo].[GetAllChildrenTypeById]
(
    @id varchar(50)
)
RETURNS TABLE 

AS


RETURN 
with cte as
(
 SELECT [id]
      ,[dictionaryTypeCode]
      ,[text]
      ,[parentId]
      ,[sort]
      ,[availabl]
      ,[leaf]
      ,[url]
      ,[value] FROM [Dictionary] where ID = @id
union all
SELECT a.[id],a.[dictionaryTypeCode],a.[text],a.[parentId],a.[sort],a.[availabl],a.[leaf],a.[url],a.[value] FROM [Dictionary] a  join cte b on a.[parentId] = b.Id
)
select id from cte 


GO