I would like to invite you to contact our Technical Support team instead (TechSupport@osisoft.com - +1-510-297-5828 ). The OSIsoft vCampus program and its various features are really meant for programming, development and integration topics. Just like Microsoft's MSDN. On the other hand, "end-user" and "PI administration" questions (e.g. installation, configuration, usage, etc.) are still best handled by our technical support team.
However, there is a workaround if you are using PI AF 2.1 or later:
You must have a tag that serves as the basis for providing high-resolution timestamps. AF essentially does an inner JOIN between a PI tag's timestamps and the timestamps in the relational table. Thus, your PI point must have matching timestamps to ensure all data is retrieved. For example, if you have a timestamp of "6/1/2009 12:00:00 am" in the table, but do not have that timestamp for a value in the PI tag, AF will not provide that value from the table.
For more details, you should have a PM from a TechSupport representative already