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MSSQL中递归SQL查询语句实例说明- - 站长搜索
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MSSQL中递归SQL查询语句实例说明-

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2022-09-23 20:39:12 转载来源: 网络整理/侵权必删

一张表(ColumnTable)的结构如下图所示当前需要实现的功能:通过Number的值为67来获取当前的节点ID、父节点ID递归实现SQL语句:复制代码代码如下:withznieyuas(selectc.Id,c

一张表(ColumnTable)的结构如下图所示

当前需要实现的功能:通过Number的值为67来获取当前的节点ID、父节点ID

递归实现SQL语句

复制代码 代码如下:

with znieyu as
(
select c.Id,c.FatherId,0 as lv1 from ColumnTable c where c.Number=67
union all
select c.Id,c.FatherId,lv1-1 from znieyu z
inner join ColumnTable c
on z.FatherId=c.Id
)
select znieyu.Id ,znieyu.FatherId,znieyu.lv1 as lv from znieyu

实现的效果:

满足条件67ID为6的递归-->6-->2(LV0)-->1(LV-1)-->0(LV-2)
满足条件67ID为8的递归-->8-->5(LV0)-->2(LV-1)-->1(LV-2)-->0(LV-3)
 很简单的一个SQL递归,记录下来...

标签: MSSQL 递归 SQL 查询 语句 实例 说明


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