def delete *where
    sql, *binds = SQLHelper.delete(:table => name, :where => @query_where + where, :prepared => true)
    pstmt = prepare :delete, sql
    pstmt.send @update_method, *binds
  end
def delete *where
    sql, *binds = SQLHelper.delete(:table => name, :where => @query_where + where, :prepared => true)
    pstmt = prepare :delete, sql
    pstmt.send @update_method, *binds
  end
Deletes records matching given condtion
 @param [List of Hash/String] where Delete filters
 @return [Fixnum] Number of affected records