In General, I recommend building an AD HOC report with the desired data in the ZENworks Report Server. These allow you to export the query used. This gives you an idea how the data is stored in a much more direct way.
Again the SQL will appear in the logs, so you can determine how to query the data.
Again...Never WRITE back to the ZENworks DB but reporting against should not be an issue so long as you are careful that your reports are not too intense.
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