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One of the properties of the SQLResultSet
containing the rows returned from a SQL query.
The SQLResultSetRowList
contains the data returned from a SQL select
statement. The object contains a length
property indicating how many rows the select
statement returns. To get a row of data, call the item
method to specify an index. It returns a JavaScript Object
whose properties are the database columns the select
statement was executed against.
function queryDB(tx) { tx.executeSql('SELECT * FROM DEMO', [], querySuccess, errorCB); } function querySuccess(tx, results) { var len = results.rows.length; console.log("DEMO table: " + len + " rows found."); for (var i=0; i<len; i++){ console.log("Row = " + i + " ID = " + results.rows.item(i).id + " Data = " + results.rows.item(i).data); } } function errorCB(err) { alert("Error processing SQL: "+err.code); } var db = window.openDatabase("Database", "1.0", "Cordova Demo", 200000); db.transaction(queryDB, errorCB);
<!DOCTYPE html> <html> <head> <title>Storage Example</title> <script type="text/javascript" charset="utf-8" src="cordova-x.x.x.js"></script> <script type="text/javascript" charset="utf-8"> // Wait for device API libraries to load // document.addEventListener("deviceready", onDeviceReady, false); // 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")'); } // Query the database // function queryDB(tx) { tx.executeSql('SELECT * FROM DEMO', [], querySuccess, errorCB); } // Query the success callback // function querySuccess(tx, results) { var len = results.rows.length; console.log("DEMO table: " + len + " rows found."); for (var i=0; i<len; i++){ console.log("Row = " + i + " ID = " + results.rows.item(i).id + " Data = " + results.rows.item(i).data); } } // Transaction error callback // function errorCB(err) { console.log("Error processing SQL: "+err.code); } // Transaction success callback // function successCB() { var db = window.openDatabase("Database", "1.0", "Cordova Demo", 200000); db.transaction(queryDB, errorCB); } // device APIs are available // function onDeviceReady() { var db = window.openDatabase("Database", "1.0", "Cordova Demo", 200000); db.transaction(populateDB, errorCB, successCB); } </script> </head> <body> <h1>Example</h1> <p>Database</p> </body> </html>