T-Sql 递归查询(给定节点查所有父节点.所有子节点的方法) -- 查找所有父节点with tab as( select Type_Id,ParentId,Type_Name from Sys_ParamType_V2_0 where Type_Id=316--子节点 union all select b.Type_Id,b.ParentId,b.Type_Name from tab a,--子节点数据集 Sys_ParamType_V2_0 b --父节点数据集 where a.
-- 查找所有父节点with tab as( select Type_Id,ParentId,Type_Name from Sys_ParamType_V2_0 where Type_Id=316--子节点 union all select b.Type_Id,b.ParentId,b.Type_Name from tab a,--子节点数据集 Sys_ParamType_V2_0 b --父节点数据集 where a.ParentId=b.Type_Id --子节点数据集.paren
select dept_id from ( select t1.dept_id,t1.parent_id, if(find_in_set(parent_id, @pids) > 0, @pids := concat(@pids, ',', dept_id), 0) as ischild from ( select dept_id,parent_id from sys_dept t where t.del_flag = '0' order by parent_id, dept_id ) t1, (
stackoverflow的解决方案,亲测有效: SELECT * FROM person WHERE department IN (SELECT department_id FROM department WHERE department_id = UNION (SELECT department_id FROM (SELECT * FROM department ORDER BY parent_id,department_id) depart_sorted, (SELECT @pv := )
;with cte as ( select * from Associator where No = 'mc1007' union all select air.* from Associator as air inner join cte on air.ParentNo = cte.No ) select * from cte;
;with cte as( select id,ParentCategoryId from Category where id = 17 union all select a.id,a.ParentCategoryId from Category a join cte b on a.ParentCategoryId = b.id where a.id is not null) select * from cte
在SQL的树型结构中,很多时候,知道某一节点的值,需要查找该节点的所有子节点(包括多级)的功能,这时就需要用到如下的用户自定义函数. 表结构如下: ID int Dep_Type int Dep_Code varchar(50) Dep_Name varchar(50) Dep_Dian int Dep_FathID int Dep_Opera varchar(50) Dep_Status int Dep_AddTime datetime 用户自定义函数如下: create function f
首先创建模型类Menus public class Menus { //菜单Id public int Id { get; set; } //菜单名 public string MenuName { get; set; } //父节点Id public int ParentId { get; set; } } 窗体中放入button跟TreeView控件 声明全局变量 private static List<Menus> menus; 添加按钮事件 private void button1_C
mysql遍历节点的所有子节点 DELIMITER // CREATE FUNCTION `getChildrenList`(rootId INT) ) BEGIN ); ); SET sTemp = ''; SET sTempChd =CAST(rootId AS CHAR); WHILE sTempChd IS NOT NULL DO SET sTemp = CONCAT(sTemp,',',sTempChd); ; END WHILE; RETURN sTemp; END ); FIND_