Returns the last value of a certain Tag stored on the database. Its formal description is the following:

E3LastValueEx(
  @strTableName VARCHAR(100),
  @strFilter    VARCHAR(500),
  @bQuality     int)

Where:

•@strTableName: Name of a table to query

•@strFilter: Filter options for the value

•@bQuality: If different from 0 (zero), only includes Tags with Good quality

This Stored Procedure returns a single result row with E3TimeStamp, Quality, and FieldValue columns.