如何實現行變調成列在MS SQL

Question

我有兩個表：

部門 - <員工

系表中有諸如數據：

id, Name 
1, Marketing 
2, Sales 

僱員表有數據如：

id, Name, DepartmentId, RatePerDay 
1, Alex,1, 40 
2, Bob,1, 30 
3, Calvin,1, 40 
4, Dal,1, 30 

我想要得到兩個數據集，如下部門：

DepartmentName, Employee1,Employee12,Employee13,Employee14 
Marketing, Alex, Bob, Calvin, Dal 

DepartmentName, RatePerDay1, RatePerDay2, RatePerDay3, RatePerDay4 
Marketing, 40,30,40,30 

我必須編寫一個MS SQL 2008存儲過程，實現這個結果？

任何幫助表示讚賞

Answer 1

好的，首先看看this link，因爲你需要動態SQL。然後，你可以嘗試以下方法：

DECLARE @EmployeesId VARCHAR(MAX), @EmployeesIdAlias VARCHAR(MAX), @Query1 VARCHAR(MAX), @Query2 VARCHAR(MAX) 
DECLARE @Rates VARCHAR(MAX), @RatesAlias VARCHAR(MAX) 

SELECT @EmployeesId = ISNULL(@EmployeesId + ',', '') + '[' + CAST(Id AS VARCHAR(10)) + ']', 
     @EmployeesIdAlias = ISNULL(@EmployeesIdAlias + ',', '') + '[' + CAST(Id AS VARCHAR(10)) + '] AS [Employee ' + CAST(Id AS VARCHAR(10)) + ']', 
     @RatesAlias = ISNULL(@RatesAlias + ',', '') + '[' + CAST(Id AS VARCHAR(10)) + '] AS [Rate ' + CAST(Id AS VARCHAR(10)) + ']' 
FROM Employees 


SET @Query1 = ' 
SELECT Department, '+@EmployeesIdAlias+' 
FROM ( SELECT A.Id, A.Name, B.Name Department 
     FROM Employees A 
     INNER JOIN Department B 
     ON A.DepartmentId = B.Id) Source 
PIVOT(MIN(Name) FOR Id IN ('+@EmployeesId+')) AS PT' 

EXEC(@Query1) 

SET @Query2 = ' 
SELECT Department, '+@RatesAlias+' 
FROM ( SELECT A.Id, A.RatePerDay, B.Name Department 
     FROM Employees A 
     INNER JOIN Department B 
     ON A.DepartmentId = B.Id) Source 
PIVOT(MIN(RatePerDay) FOR Id IN ('+@EmployeesId+')) AS PT' 

EXEC(@Query2) 

Answer 2

樞軸可以爲你做什麼工作：

http://msdn.microsoft.com/en-us/library/ms177410.aspx http://archive.msdn.microsoft.com/SQLExamples/Wiki/View.aspx?title=PIVOTData