with as递归调用

一、递归调用--在代码中偶尔看到以记之，便于下次学习

https://blog.csdn.net/johnf_nash/article/details/78681060

--查询节点及其下所有子节点
WITH T AS
    ( SELECT id as ids,ModuleName,ParentId,IconPath,JspPath FROM T_Sys_MenuModule WHERE ParentId = '' and  isshow =1 UNION ALL SELECT a.id,
    a.ModuleName,a.ParentId,a.IconPath,a.JspPath FROM T_Sys_MenuModule a INNER JOIN T ON a.ParentId = T.ids  where  isshow =1)
 SELECT * FROM T left join T_Sys_RoleAuthority a on a.moduleid = T.ids where   roleid='' or  1=0 order by T.ids asc;