How to pivot in SQL

Question

I am not sure if this would be called pivoting.

Data in my SQL 2005 table [CustromerRoles] is as such:

CustId  RoleId
2        4
2           


        

Answer 1

Have you read the documentation on PIVOT in Microsoft SQL Server 2005?

SELECT CustId, 
  [1] AS Admin,
  [2] AS Manager,
  [3] AS Support,
  [4] AS Assistant
FROM (SELECT c.CustId, r.RoleId
FROM CustomerRoles c JOIN Roles r USING (RoleId)) AS s
PIVOT (
 COUNT(CustId)
 FOR RoleId IN ([1], [2], [3], [4])
) AS pvt
ORDER BY CustId;

I haven't tested the above, but just based it on the doc. This may get you started.

There doesn't seem to be a way to generate the columns dynamically. You have to hard-code them.