SSRS Group by in the Report Header

Question

I am working on a simple SSRS Report.

Report Header     : AccountName
Report Sub Header : Group By CustomerName, Address
In the Detail,  I need Column1,Column2,Column3

I am able to show the Detail section in a Table Format. I am not able to set the Report Header and Report Sub Header. How to set the Report Header Group

I kept the SQL Fiddle for Sample set of Records.

http://sqlfiddle.com/#!6/2d9d2/2

Sample Report Design

Answer 1

After reading your comments, and your further explanation I can tell you one thing, The formatting you have shown in your desired output is not possible.

What you want is a some text boxes along with a tablix, But as you have shown the sub-report header and client names and city fields in your report this can only be achieved using a List data region.

Table format shown can only be achieved from a tablix data region. But a hybrid report which may look like you have a tablix within your list region can be achieved as follows.(as in ssrs you cannot mix different types of data regions)

Obviously this is has very basic almost no formatting, you can spice it up a bit more with your designing abilities :)