SQL insert

query1.Close;
query1.SQL.Clear;
query1.SQL.Add('insert into historico (proveedor,fecha,articulo,talla,pcoste,pvp) values ('+#39+proveedor+#39+','+#39+Getfecha+#39+','+#39+edit1.text+#39+','+#39+edit2.text+#39+','+#39+floattostr(pcoste)+#39+','+#39+floattostr(pvp)+#39+')');
query1.ExecSQL;