利用XML FOR PATH 合并分组信息

    -- ================================================  
    -- Description:合并分组内容  
    -- Author:夏保华  
    -- Date:2009-08-06  
    -- ================================================  
    create   table   Employees(DepartmentName varchar(50),EmpoyeeName  varchar(20))     
    insert into Employees     
    select '开发部','小刘' union all  
    select '开发部','小王' union all  
    select '开发部','小张' union all  
    select '工程部','老吴' union all  
    select '工程部','老李' union all  
    select '市场部','大兵' union all  
    select '市场部','大黄' union all  
    select '市场部','大虾' union all  
    select '市场部','大国'  
    go   
      
    create function  Sum_ByGroup(@DepartmentName varchar(50))     
    returns varchar(8000)     
    as     
    begin     
        declare @ret varchar(8000)     
        set   @ret  =  ''     
        select  @ret  =  @ret+','+EmpoyeeName from Employees where DepartmentName = @DepartmentName     
        set   @ret   =   stuff(@ret,1,1,'')     
        return   @ret       
    end     
    go  
      
    select DepartmentName,dbo.Sum_ByGroup(DepartmentName) as EmployeesList from Employees  
    group by DepartmentName  
    go  

 实现方式二：利用 T-SQL 技术生成 XML 的方法

    select DepartmentName,stuff((select ','+EmpoyeeName from Employees where DepartmentName = e.DepartmentName for xml path('')),1,1,'') as EmployeesList from Employees E  
    group by DepartmentName  

 转自：http://blog.csdn.net/fox123871/article/details/6656334