procedure TForm1.Button1Click(Sender: TObject);
var
sqltxt:string;
php:string;
abc:string;
def:string;
begin
php:=trim(edit1.text);
abc:=trim(edit2.Text);
def:=trim(edit3.Text);
sqltxt:='select * from lianxi where 客户名称 like ''' +php+ ''' and 客户地址 like '''+abc+''' and 联系电话 like '''+def'''';
with adoquery1 do
begin
close;
adoquery1.SQL.Clear;
adoquery1.sql.Add(sqltxt);
open;
end;
end;