InterviewSolution
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How Do We Display And Extract Historical Data? |
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Answer» The Historical database or Historian is a SQL accessible database. This allows SQL queries to access the data and display it on screens. There are also STANDARD tools to EXTRACT the data so no SQL knowledge is required to extract data. For INSTANCE, display the Maximum and Average can be internal to a mimic or external to a mimic (a TREND page to itself). The Historical database or Historian is a SQL accessible database. This allows SQL queries to access the data and display it on screens. There are also standard tools to extract the data so no SQL knowledge is required to extract data. For instance, display the Maximum and Average can be internal to a mimic or external to a mimic (a trend page to itself). |
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