System And Method For Retrieving And Processing Information From A Supervisory Control Manufacturing/Production Database
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United States of America Patent
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Issued Date -
Nov 17, 2011
app pub date -
May 17, 2010
filing date -
May 17, 2010
priority date (Note) -
Abandoned
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Abstract
A database server for handling steams of time stamped data points for tagged variables is disclosed herein that supports a set of advanced data retrieval operations/queries invoked by clients of the database server. The advanced data retrieval operations are invoked by client queries to provide, on demand, secondary information by processing previously tabled data corresponding to received data streams rendered by a variety of data sources in a supervisory control/monitoring, process control and/or automated equipment environment. Calculations, on previously stored data, for rendering the secondary information are performed within the database server at the time the secondary information is requested by a client of the historian that maintains a database containing the previously stored data. Moreover, a filtering stage and enhanced time-in-state processing operations are supported.
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