WebSQL CRUD Function using basic HTML and JavaScript
Question
I have an example database here, which needs CRUD functions to add more data from the UI, its a WebSQL and I cant seem to find a way through, anyone wna help? Users should be able to save and create, read, update and delete their input data.
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<!DOCTYPE html>
<html>
<head>
<title>Contact Example</title>
<script type="text/javascript" charset="utf-8" src="phonegap.js"></script>
<script type="text/javascript" charset="utf-8">
var db = window.openDatabase("Database", "1.0", "PhoneGap 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(err) {
alert("Error processing SQL: "+err);
}
// Transaction success callback
//
function successCB() {
alert("Database created, and polated");
}
</script>
</head>
<body>
<h1>Example</h1>
<p>SQLTransaction</p>
</body>
</html>
2 answers
solution1
0 2014-10-05 20:55:05
Websql is CRUD by nature. You will need to learn SQL if you do not know it. There is a tool websql.js that wraps calls in promises for a nicer syntax but very much still uses SQL.
solution2
0 2012-02-21 22:57:59
It is not secure to place a db-logic directly into client's html as anyone will be able to see it by looking into a source code. Consider using any server-side scripting (PHP, ASP.NET).
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