procedure TForm2.Button2Click(Sender: TObject);
var
qday:TDateTime;
begin
qday:=strToDate(dbtext2.Caption) ;
adoquery3.Close;
adoquery3.SQL.Clear;
adoquery3.SQL.Add('select * from qa WHERE q_name= '''+dbtext1.Caption+'''and q_day= qday and q_title='''+dbedit1.Text+'''') ;
adoquery3.Open;
end;
提示错误说qday没有默认值 我要如何做