Model a MN-Statement based on Table, Columns and Values
author: Jakob Braeuchi version: $Id: SqlMNStatement.java,v 1.8.2.1 2005/12/21 22:23:44 tomdz Exp $
Appends to the statement a comma separated list of column names.
Parameters: columns - defines the columns to be selected (for reports) list of column names
Generate a sql where-clause matching the contraints defined by the array of fields
Parameters: columns - array containing all columns used in WHERE clause