two colomns retrieving from two tables from database

HI I want to retrive from two table values into one picker in two colums, I have writtern like this, Is this correct , if not can anyone help me,

var pickerValues = [];
var rows = db.execute('SELECT * FROM Table1');
 
while (rows.isValidRow())
{
pickerValues.push(Ti.UI.createPickerRow({
    //width:'300',
    title:rows.fieldByName('Field_name'),
    id:rows.fieldByName('Filed_Id') 
}));
 
    //l++;
rows.next();
}
var column1 = Ti.UI.createPickerColumn( {
        rows: pickerValues,fontSize: "40dp",width:"300"
    });
 
var pickerValues1 = [];
var rows1 = db.execute('SELECT * FROM Field2');
 
while (rows1.isValidRow())
{
pickerValues1.push(Ti.UI.createPickerRow({
    //width:'300',
    title:rows.fieldByName('Field1_Name'),
    id:rows.fieldByName('Field1_Id') 
}));
 
    //l++;
rows1.next();
}
var column2 = Ti.UI.createPickerColumn( {
        rows: pickerValues1,fontSize: "40dp",width:"300"
    }); 
 var picker = Ti.UI.createPicker({
  top:'14%',
  borderColor:'#B6B6B4',
  visibleItems:6,
  columns: [column1,column2],
  useSpinner: true
});
picker.selectionIndicator = true;   
self.add(picker);