Export WebSQL to CSV Locally with force download - http://stackoverflow.com/questions/9279664/export-websql-to-csv-locally

gistfile1.js

testCSV = function(){
 var csvData = "";
 db.transaction(function(tx){
 tx.executeSql('SELECT * FROM grocery', [], function (tx, results){
 var len = results.rows.length, i;

  for (i = 1; i < len; i++) {
   csvData += results.rows.item(i).itemno + "," + results.rows.item(i).quantity + "\n";
   }
 window.location='data:application/webcsv;charset=utf8,' + encodeURIComponent(csvData);
  });

 });
};