text: ﻿CREATE PROCEDURE [dbo].[GetTimeStamps]
  AS
  	RETURN 
  	SELECT res.[TimeStamp] FROM
  	((SELECT [TimeStamp] FROM DataSourcesHistory)
  	UNION
  	(SELECT [TimeStamp] FROM FetchEngineHistory)
  	UNION
  	(SELECT [TimeStamp] FROM VariableMappingHistory)
  	) res ORDER BY [TimeStamp] DESC