SQL query to convert rows into columns

Question

I have the following table in SQL Server 2008:

[ID] [Filiale] [Mitarbeiter]
1    01        Müller
2    01        Meier
3    01        Schmidt
4    02        Schu         


        

Answer 1

With SQL Server 2008 the Pivot and Ranking functions combined give you the desired result for each number of employees First we assign an ID to each empoyee in each branch starting with 1 in each new branch then we use the pivot operator to flip the result

create table data
(
id int, 
branch int, 
employee varchar(20)
)

 insert into data (id, branch, employee) values
 (1, 1, 'Müller'),
 (2, 1, 'Meler'),
 (3, 1, 'Schmidt'),
 (4, 1, 'Schultz'),
 (5, 2, 'Schröder'),
 (6, 2, '=tg= Thomas'),
 (7, 3, 'Stephan')


select branch, [1] as emp1, [2] as emp2, [3] as emp3, [4] as emp4, [5] emp5 
from
(
  select ROW_NUMBER() over (partition by branch order by id) employee_branch_id, branch, employee 
    from data
) data_with_employee_branch_id -- assign a number from 1 to n for each emplyee in the branch 
pivot 
(
  max(employee) --it must be a aggregat, since we have only one row the max of a string will be the string
  for employee_branch_id in ( [1], [2], [3], [4], [5] )
) as data_pvt