I'm going to suggest going another direction...what you (and they) want are a BI system. You can present a set of reports and the system provides for their ability to do ad hoc reporting and such like.
<http://www.softwareforenterprise.us/2009/12/21/list-of-top-open-source-business-intelligence-bi-software-solutions/> <http://www.pentaho.com/> <http://www.jaspersoft.com/> <http://www.icCube.com/> These sorts of things let the end user have at the data, but not in ways they can mess anythign up, and with the proper DB design they won't get the wrong answers from their data... -- Bruce Johnson University of Arizona College of Pharmacy Information Technology Group Institutions do not have opinions, merely customs
