SQL Pivot Query

Hi Experts

I recently purchased a copy of Gordon's book to help me create a pivot query based on the examples at the end which I hope to show me a set of data based on my Sales Order tables.   Unfortunately I have found it a little too complex.

In my ORDR table I have 10 UDFs which relate to various statuses and dates in the sales order process. 

What I would like is to see a pivot table query of the sum quanties of items at the different stages (as rows) against the dates in weeks.

In the rows would be the status UDF fields:

U_DES_STAGE

U_PRN_STAGE

U_PRS_STAGE

U_SEW_STAGE

U_EMB_STAGE

for each UDF there is an associated date UDF

U_DES_STAGE_DATE

U_PRN_STAGE_DATE

U_PRS_STAGE_DATE

U_SEW_STAGE_DATE

U_EMB_STAGE_DATE

The columns I require in the pivot table would be the UDF stage dates which are always input for the week ending Friday.

The data in the pivot should be the sum of the quantities in the sales orders rows RDR1.

The problem is that I am not sure as to how to add the WHERE clause to limit the results to only the 5 items (DES% or PRN% or PRS% or SEW% or EMB%)

I would be very grateful for any assistance.

Regards

Geoff