A query

Hello,

Using MS SQL Server 2008.

I need help with a query that i think can be solved easily by an expert.

I have six tables that I need to join in a view.  There are three base tables.  These are Users, Pens and Applications.

The Users table contains users and has a unique key called usr_id (integer)

The Pens table contains pens and has a unique key called pen_id(integer).

The Applications table contains a list of applications and has a unique key called app_id(integer).

Then there are two tables called UsersPens and UsersApplications.  These simply list which pens and applications a user has access to.

UserPens has two columns which are usr_id and pen_id.

UserApplications has two columns which are usr_id and app_id.

And finally we have the sixth table that list documents.  These documents have been generated by applications and completed using pens.

A user is only allowed to view documents when they have both the pen and the application in the UsersPens and UsersApplications table.  i.e. their usr_id is matched with the pen_id and app_id.

The Documents table has pen_id and app_id columns. It also has a unique column called doc_id (integer).

I need a sql statement, that given a usr_id, will return a list of the documents (doc_id column) the user can view.