procedure TForm1.ComboBox1Change(Sender: TObject);
var i:integer;
begin
with query1 do
begin
close;
sql.Clear;
sql.Add('select * from '''+combobox1.Text+'''');//combobox1.text是表名
open;
end;
for i:=0 to query1.FieldCount-1 do
begin
checklistbox1.Items.Add(query1.Fields[i].FieldName)
end;
end;