ionic framework (angularjs) and database sqlite3

First of all, download ng-cordova, and put it in js folder.

In index.html, you need to load ng-cordova. The order of js import is very important.

<!-- ionic/angularjs js -->
<script src="lib/ionic/js/ionic.bundle.js"></script>

<script src="js/ng-cordova.min.js"></script>
<script src="cordova.js"></script>

<!-- your app's js -->

In your app.js, create a variable called db before all. This is useful to get access from all controllers.

Then add 'ngCordova' at module dependencies.

In $ionicPlatform.ready(), you must open your database. If you want, you can execute queries from here too.

var db = null;
angular.module('starter', ['ionic', 'ngCordova', 'starter.controllers', 'starter.services'])

  .run(function($ionicPlatform, $cordovaSQLite) {
     $ionicPlatform.ready(function() {

         db = $cordovaSQLite.openDB({name: "mydatabase.db"});
         $cordovaSQLite.execute(db, "CREATE TABLE IF NOT EXISTS tags (id integer primary key, name text)");
     });
  })

In your controller add $cordovaSQLite, and now you can execute queries inside a controller.

Works inside scope functions as well.

.controller('TagsCtrl', function($scope, $cordovaSQLite) {

        var query = "SELECT Count(id) AS count FROM tags";
        $cordovaSQLite.execute(db, query).then(function(result) {
            if (result.rows.item(0).count > 0) {
                alert("database has rows");
            } else {
                alert("0 rows");
            }
        }, function(error) {
            alert("error");
        });
 })

I don't know if this is the best way, but it works. Hope this help.