Database

Contains methods that allow the user to manipulate the Database

Methods

  • transaction: Runs a database transaction.
  • changeVersion: method allows scripts to atomically verify the version number and change it at the same time as doing a schema update.

Details

A Database object is returned from a call to window.openDatabase().

Supported Platforms

  • Android
  • BlackBerry WebWorks (OS 6.0 and higher)
  • iPhone
  • webOS
  • Tizen

Transaction Quick Example

function populateDB(tx) {
     tx.executeSql('DROP TABLE IF EXISTS DEMO');
     tx.executeSql('CREATE TABLE IF NOT EXISTS DEMO (id unique, data)');
     tx.executeSql('INSERT INTO DEMO (id, data) VALUES (1, "First row")');
     tx.executeSql('INSERT INTO DEMO (id, data) VALUES (2, "Second row")');
}

function errorCB(err) {
    alert("Error processing SQL: "+err.code);
}

function successCB() {
    alert("success!");
}

var db = window.openDatabase("Database", "1.0", "Cordova Demo", 200000);
db.transaction(populateDB, errorCB, successCB);

Change Version Quick Example

var db = window.openDatabase("Database", "1.0", "Cordova Demo", 200000);
db.changeVersion("1.0", "1.1");

Full Example

<!DOCTYPE html>
<html>
  <head>
    <title>Storage Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-2.3.0.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Wait for Cordova to load
    //
    document.addEventListener("deviceready", onDeviceReady, false);

    // Cordova is ready
    //
    function onDeviceReady() {
        var db = window.openDatabase("Database", "1.0", "Cordova Demo", 200000);
        db.transaction(populateDB, errorCB, successCB);
    }

    // Populate the database 
    //
    function populateDB(tx) {
         tx.executeSql('DROP TABLE IF EXISTS DEMO');
         tx.executeSql('CREATE TABLE IF NOT EXISTS DEMO (id unique, data)');
         tx.executeSql('INSERT INTO DEMO (id, data) VALUES (1, "First row")');
         tx.executeSql('INSERT INTO DEMO (id, data) VALUES (2, "Second row")');
    }

    // Transaction error callback
    //
    function errorCB(tx, err) {
        alert("Error processing SQL: "+err);
    }

    // Transaction success callback
    //
    function successCB() {
        alert("success!");
    }

    </script>
  </head>
  <body>
    <h1>Example</h1>
    <p>Database</p>
  </body>
</html>