Need to avoid repeated data in a DataGrid

Hi there :)

I am developing a system for my uni course and I am stuck a little problem...

Basically its all about lecturers, students modules etc - A student has many modules, a module has manu students, a lecturer has many modules and a module has many lecturers.

I am trying to get a list of lecturers that run modules associated with a particular student. I am able to get a list of the appropriate lecturers, but some lecturers are repeated because they teach more than one module that the student is associated with.

How can I stop the repeats?

Heres my sql select code in my cs file:

string sqlDisplayLec = "SELECT * FROM student_module sm, lecturer_module lm, users u WHERE sm.user_id=" + myUserid + "" + " AND lm.module_id = sm.module_id " + " AND u.user_id = lm.user_id ";
SqlCommand sqlc2 = new SqlCommand(sqlDisplayLec,sqlConnection);
sqlConnection.Open();
lecturersDG.DataSource = sqlc2.ExecuteReader(CommandBehavior.CloseConnection);
lecturersDG.DataBind();

And here is a pic of my Data Model:
Data Model Screenshot

Any ideas? Many thanks :) !Its ok, sorted it now :)

Need SQL to perform Repeater paging

I want to build some paging functionality into my repeater (b4 you ask, datagrid not providing flexibility required for presentation).

I will have no problem with the VB logic but I will need to execute SQL that only returns results from x to y (e.g. results 21 thru 40 for page 2). I know I can do something like 'SELECT TOP 20 * FROM...', or something like it, for page 1. But, I'm not sure if it's possible to build SQL for the pages greater than 1. Any suggestions.

Thanks
MartinSorry to waste your time, I found a solutionhere.

Thanks anyway,
Martin