public IHavingOrOrderBy GroupBy(string column)
{
if (string.IsNullOrEmpty(column))
{
throw new ArgumentException(ExceptionMessages.ArgumentNullOrEmpty.FormatWith("column"));
}
this.InnerSql.Append(" GROUP BY ");
this.InnerSql.Append(this.SqlCharacters.EscapeSql(column));
return this;
}