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  ADOQuery1.Close;
  ADOQuery1.SQL.Clear;
  ADOQuery1.SQL.Add('select * from TT where name='''+Edit1.Text+''' and dateday='+Datetostr(DateTimePicker1.DateTime));
  ADOQuery1.Open;
  if not ADOQuery1.eof then
  begin
  showmessage('¼ÇÂ¼ÖØ¸´');
  exit;
dateday×Ö¶ÎÊÇʲôÀàÐÍ£¬Èç¹ûÊÇ×Ö·ûÀàÐÍ£¬ÄÇÈÕÆÚÖµÒª¼ÓÒýºÅ£¬Èç¹ûÊÇÈÕÆÚÀàÐ͸ñʽ£¬¶ÔÓÚaccessÊý¾Ý¿âÈÕÆÚֵҪǰºó¼Ó'#'ÐÞÊηû

'select * from TT where name='''+Edit1.Text+''' and '# dateday #'='+Datetostr(DateTimePicker1.DateTime));


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format('%.10f',[datetime]),²»¹ýÕâÑùÓеãÎó²î

ADOQuery1.SQL.Add('select * from TT where name='''+Edit1.Text+''' and dateday=:day');
adoquery1.Parameters.ParamByName('day').Value := DateTimePicker1.DateTime


ADOQuery1.SQL.Add('select * from TT where name=:name and dateday=:day');
adoquery1.Parameters.ParamByName('day').Value := DateTimePicker1.DateTime;
adoquery1.parameters.parambyname('name').value := Edit1.Text;


dateday×Ö¶ÎÓ¦¸ÃÊÇÈÕÆÚÀàÐ͵İɣ¿Ê±¼äÄǶù¼Ó¸ö'#' ¾ÍºÃ

ADOQuery1.SQL.Add('select * from TT where name= '+Edit1.Text+' and


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CreateDatabase Method Example
This example uses CreateDatabase to ......
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