what are the drawbacks of using an existing OLTP database as a datasource
for creating data mining models?
I mean using the OLTP database without extracting its data to a data
warehouse...

I need to calculate the 90th and 50th percentile for a group of scores.  Can
someone help me with accomplishing this?
tx,
td

i can't seem to get this working, can someone help me?
SELECT     Analytes.Analyte, Analytes.CAS, ermi.dbo.AnalysisAnalyte.MDL
FROM         Analytes INNER JOIN
                     ermi.dbo.AnalysisAnalyte ON

A have a form with 3 cells:
1. Where I select a Customer_Name from a table
2. Where I select Date_In from a calendar
3. Where I select Date_Out from a calendar