來自SQL Server 2008表的矩陣顯示

Question

有誰知道如何從數據庫表創建矩陣顯示？
我使用ASP.NET C＃和數據庫是SQL Server 2008.

表看起來像這樣。

我想矩陣看起來像這樣或類似的。

Answer 1

這裏我的建議是拉出來的數據恰好你有它的格式，爲實體的名單（在其最簡單的）：

public class ServerApplicationRelationship 
{ 
    public string Server{get;set;} 
    public string Application{get;set;} 
} 

而自己創建一個自定義該控件使用List<ServerApplicationRelationship>作爲其數據源呈現HTML表格。

從提供的數據中呈現該表格應該非常容易。

如果你真的想拉出來的數據從SQL那個形狀，你可以使用查詢，如

select application, 
      case when exists(select 1 from example where application=ex.application and server='server 1') THEN 1 ELSE 0 end as [server 1], 
      case when exists(select 1 from example where application=ex.application and server='server 2') THEN 1 ELSE 0 end as [server 2], 
      case when exists(select 1 from example where application=ex.application and server='server 3') THEN 1 ELSE 0 end as [server 3] 
    from yourTable ex 
    group by application 

Answer 2

使用TSQL樞

create table table1 
(
    serverName varchar(30), 
    app varchar(50) 
); 
go 

insert table1 (serverName , app) values ('server1' , 'app A'); 
insert table1 (serverName , app) values ('server2' , 'app A'); 
insert table1 (serverName , app) values ('server2' , 'app B'); 
insert table1 (serverName , app) values ('server3' , 'app B'); 
insert table1 (serverName , app) values ('server1' , 'app C'); 
insert table1 (serverName , app) values ('server3' , 'app C'); 
go 

create procedure GetPivotTable 
as begin 
DECLARE @PivotColumnHeaders VARCHAR(MAX) 
SELECT @PivotColumnHeaders = 
    COALESCE(@PivotColumnHeaders + ',[' + cast(t.serverName as varchar) + ']' , 
    '[' + cast(t.serverName as varchar)+ ']') 
FROM (select distinct serverName from table1) t 


DECLARE @PivotTableSQL NVARCHAR(MAX) 
SET @PivotTableSQL = N' 
select * from 
(select app, serverName from table1) sourceTable 
pivot 
(
    count(serverName) for serverName in (' + @PivotColumnHeaders + ') 
) pivottable 
' 
EXECUTE(@PivotTableSQL) 
end 

go 

exec GetPivotTable