Question

我有两张桌子：

部门 - ＆lt;员工

部门表格包含以下数据：

id, Name
1, Marketing
2, Sales

员工表包含以下数据：

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

我想为每个部门提供以下两个数据集：

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

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

我必须编写一个MS SQL 2008存储过程来实现这个结果吗？

感谢任何帮助

Answer 1

Pivot可能会为您的工作而努力：

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

Answer 2

好的，首先看一下this link，因为你需要动态SQL。然后你可以尝试以下方法：

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)

如何在MS SQL中实现将行转换为列

2 个答案: