Directory Mail Merge

To see how to do so with any mailmerge data source supported by Word, check out my Microsoft Word Catalogue/Directory Mailmerge Tutorial at:
http://www.msofficeforums.com/mail-m...-tutorial.html
or:
http://www.gmayor.com/Zips/Catalogue%20Mailmerge.zip
The tutorial covers everything from list creation to the insertion & calculation of values in multi-record tables in letters. Do read the tutorial before trying to use the mailmerge document included with it.

Depending on what you're trying to achieve, the field coding for this can be complex. However, since the tutorial document includes working field codes for all of its examples, most of the hard work has already been done for you - you should be able to do little more than copy/paste the relevant field codes into your own mailmerge main document, substitute/insert your own field names and adjust the formatting to get the results you desire. For some worked examples, see the attachments to the posts at:
http://www.msofficeforums.com/mail-m...html#post23345
http://www.msofficeforums.com/mail-m...html#post30327

Another option would be to use a DATABASE field in a normal ‘letter’ mailmerge main document and a macro to drive the process. An outline of this approach can be found at: http://answers.microsoft.com/en-us/o...1-1996c14dca5d

Conversely, if you create a new worksheet in your Excel workbook with a separate table containing just a single instance of each of the grouping criteria (e.g. Region), a DATABASE field in a normal ‘letter’ mailmerge main document could be used without the need for a macro. An outline of this approach can be found at:
https://answers.microsoft.com/en-us/...f-8642e46fa103
For a working example, see:
http://www.msofficeforums.com/mail-m...-multiple.html

Alternatively, you may want to try one of the Many-to-One Mail Merge add-ins, from:
Graham Mayor at http://www.gmayor.com/ManyToOne.htm; or
Doug Robbins at https://onedrive.live.com/?cid=5AEDC...43615E886B!566

If you used the directory merge instructions in my tutorial, there would be no blank rows to delete.

The tutorial shows how to create tables whose row count varies according to the number of records per group. There's a whole section on that topic.