Home Database Mysql Tutorial mssql server 递归查询的sql语句

mssql server 递归查询的sql语句

Jun 07, 2016 pm 05:48 PM
gt lv

下面介绍一下关于mssql server中使用递归的sql查询语哦,有需要的朋友可以参考一下。

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:

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 代码如下 复制代码
with znieyu as<br>(<br> c.Id,c.FatherId,0 as lv1 from ColumnTable c where c.Number=67<br>union all<br>select c.Id,c.FatherId,lv1-1 from znieyu z<br>inner join ColumnTable c <br>on z.FatherId=c.Id<br>)<br>select znieyu.Id ,znieyu.FatherId,znieyu.lv1 as lv from znieyu
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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)

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