/// <summary>
        /// Gets ValidFrom column (sql formatted)
        /// </summary>
        /// <param name="tableName">If not empty table name is part of column name</param>
        /// <param name="scdColumn">SCD ValidFrom Column</param>
        /// <param name="prefix">column prefix</param>
        /// <param name="postfix">column postfix</param>
        /// <param name="spaces">Number of space at the beginnung of a row</param>
        /// <returns>ValidFrom column</returns>
        public static string GetSqlValidFrom(string tableName, SCDColumn scdColumn, string prefix, string postfix, int spaces)
        {
            string result     = "";
            string columnName = tableName == "" ? scdColumn.ColumnName : tableName + "_" + scdColumn.ColumnName;

            AddBrackets(ref prefix, ref postfix);

            result = prefix + columnName + postfix;
            result = result.PadLeft(result.Length + spaces);

            return(result);
        }
        /// <summary>
        /// Does the SCD column list contain the specified column?
        /// </summary>
        /// <param name="scdColumn">SCD column</param>
        /// <returns>Does the SCD column list contain the specified column?</returns>
        private bool ContainsSCDColumn(SCDColumn scdColumn)
        {
            foreach (SCDColumn col in ScdColumns)
            {
                if (col.ColumnName == scdColumn.ColumnName)
                {
                    return(true);
                }
            }

            return(false);
        }