I suggest to take the Teradata classes from Manohar. He explained each and every topic very clearly and has indepth knowledge in the subject.
If you are interested reach out to him @sunmanu9@gmail.com
Watch the demo sessions in using below links
http://www.youtube.com/watch?v=h6_zs6Pvb_ck
http://www.youtube.com/watch?v=Y4j4qnjjf4
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