表1 
id         name       descript         value1       value2 1001     jack         xxx                   10               20 
1002     tom           ggg                   15               30 
1003     hat           jjj                   50               70 表1已在DBGrid中显示了,要求一打开页面DBGrid显示的格式如下,value2的值覆盖了value1的值并且value2可以填入数值: 
    id         name       descript         value1       value2   1001     jack         xxx                     20 
  1002     tom           ggg                     30 
  1003     hat           jjj                     70 ;