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# Historian Client
Use OLE DB provider to access data in the History Blocks
WW Historian OLE DB provider name is "INSQL"
To access the OLE DB, any COM-based client app must connect directly to the SQL Server and then specify to use the Wonderware Historian OLE DB provider inthe syntax of the query.
SELECT * FROM History {History data tables}
WHERE TagName = 'tagname'
AND DateTime >= '2014-01-01 12:59:00'
AND DateTime <= '2014-01-02 12:59:00'