sql-server-2005 - 使用 CTE 递归 SQL Server 2005 访问其他节点信息

Question

后台表格数据：

memberid sponsorid mailfirstname maillastname
1000     NULL      Foo           Chu
1001     1000      Foo1          Chu1
1002     1001      Foo2          Chu2
1003     1002      Foo3          Chu3
1004     1003      Foo4          Chu4

下面的脚本打印出我当前所在的成员。但我也想同时打印该成员的赞助商信息。所以，目前我得到：

Level memberid sponsorid mailfirstname maillastname
0     1000     NULL      Foo           Chu
...
2     1004     1003      Foo4          Chu4

但对于 1004 会员，我还想要他们的赞助商：

Level memberid sponsorid mailfirstname maillastname sponsorfname sponsorlname
2     1004     1003      Foo4          Chu4         Foo3         Chu3

询问：

WITH Heirarchy
AS
(
   SELECT 
      CONVERT( INT , 0 ) [Level],
      T1.memberid,
      T1.sponsorid,
      T1.mailfirstname,
      T1.maillastname
   FROM
      members T1
   WHERE
      T1.memberid = 20000283

   UNION ALL

   SELECT 
      CONVERT( INT , ( TH.[Level] + 1 ) ) [Level],
      T1.memberid,
      T1.sponsorid,
      T1.mailfirstname,
      T1.maillastname
   FROM
      members T1
   INNER JOIN 
      Heirarchy TH ON TH.memberid = T1.sponsorid
)
SELECT * 
FROM Heirarchy 
ORDER BY level, maillastname

Answer 1

它应该可以帮助你

在下面的脚本中，我检索所有成员及其赞助商

WITH Heirarchy
AS
(
   SELECT 
      0 AS [Level],
      T1.memberid,
      T1.sponsorid,
      T1.mailfirstname,
      T1.maillastname,
      T1.mailfirstname AS sponsorfname,
      T1.maillastname AS sponsorlname
   FROM
      members T1
   WHERE
      T1.sponsorid IS NULL
   UNION ALL
   SELECT
      TH.[Level] + 1 AS [Level],
      T1.memberid,
      T1.sponsorid,
      T1.mailfirstname,
      T1.maillastname,
      TH.mailfirstname,
      TH.maillastname
   FROM
      members T1
   INNER JOIN 
      Heirarchy TH ON TH.memberid = T1.sponsorid
)
SELECT * 
FROM Heirarchy
ORDER BY level, maillastname

SQLFiddle上的演示