所有
我有一个来自多个SQL Server表的结果集,我需要知道获取所需的排序记录的最佳方法是什么。
我有以下记录;用户名和模块号作为父记录,然后对于每个模块,有多个子模块子记录。我遇到的问题是模块记录与每个子模块记录有关联。因此,我从我的存储过程中得到以下记录:
NAME Module Sub-module
Derek Kenney 1 1
Derek Kenney 1 2
Derek Kenney 1 3
Derek Kenney 1 4
Derek Kenney 1 5
我想要的是:
NAME Module Sub-module
Derek Kenney 1 1
2
3
4
5
我认为我的问题属于我在下面发布的问题。
ALTER PROCEDURE [dbo].[uspGetReportData]
AS
BEGIN
SELECT first_name, last_name, email, country_id, T_User_Info.user_id, T_Modules_Viewed.module_id as 'modules viewed', T_Modules_Completed.module_id as 'modules completed'
FROM T_User_Info inner join T_Modules_Viewed on T_User_Info.user_id = T_Modules_Viewed.user_id left outer join T_Modules_Completed
on T_Modules_Viewed.user_id = T_Modules_Completed.user_id
END
也许在ADO.NET中有一种方法可以获得我想要的结果集,而我却不知道它。任何帮助将不胜感激。
德里克肯尼
答案 0 :(得分:1)
尝试这样的事情:
DECLARE @YourData table (YourName varchar(20), Module char(1), SubModule char(1))
INSERT INTO @YourData VALUES ('Derek Kenney',1,1)
INSERT INTO @YourData VALUES ('Derek Kenney',1,2)
INSERT INTO @YourData VALUES ('Derek Kenney',1,3)
INSERT INTO @YourData VALUES ('Derek Kenney',1,4)
INSERT INTO @YourData VALUES ('Derek Kenney',1,5)
INSERT INTO @YourData VALUES ('Derek Kenney',2,1)
INSERT INTO @YourData VALUES ('Derek Kenney',2,2)
INSERT INTO @YourData VALUES ('Derek Kenney',2,3)
INSERT INTO @YourData VALUES ('Joe Smith' ,1,1)
INSERT INTO @YourData VALUES ('Joe Smith' ,2,1)
INSERT INTO @YourData VALUES ('Joe Smith' ,2,2)
SELECT
CASE WHEN NameRank=1 /*OR NameModuleRank=1*/ THEN YourName ELSE '' END AS YourName
,CASE NameModuleRank WHEN 1 THEN Module ELSE '' END AS Module
,SubModule
FROM (SELECT
YourName,Module,SubModule
,ROW_NUMBER() OVER(partition by YourName ORDER BY YourName) AS NameRank
,ROW_NUMBER() OVER(partition by YourName,Module ORDER BY YourName,Module) AS NameModuleRank
FROM @YourData
) dt
输出:
YourName Module SubModule
-------------------- ------ ---------
Derek Kenney 1 1
2
3
4
5
2 1
2
3
Joe Smith 1 1
2 1
2
(11 row(s) affected)
如果需要,可以取消注释案例中的OR,以便在模块更改时显示YourName