HTML Code
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Web SQL INSERT OR REPLACE</title>
  <style>
    body { font-family: system-ui, sans-serif; margin: 1.5rem; line-height: 1.5; }
    button { margin-right: 0.5rem; margin-bottom: 0.5rem; padding: 0.5rem 0.9rem; cursor: pointer; }
    #status { margin-top: 1rem; }
  </style>
</head>
<body>
  <h1>INSERT OR REPLACE</h1>
  <p>Upsert the same primary key and list the row.</p>

  <button type="button" id="replaceBtn" disabled>OR REPLACE id 1</button>
  <button type="button" id="listBtn" disabled>List id 1</button>

  <p id="status">Checking Web SQL&hellip;</p>

  <script>
    var statusEl = document.getElementById('status');

    if (!window.openDatabase) {
      statusEl.textContent = 'Web SQL is not available in this browser.';
    } else {
      var db = openDatabase('tryitWsqlInsertReplace', '1.0', 'Try It', 1024 * 1024);
      var clicks = 0;

      db.transaction(function (tx) {
        tx.executeSql(
          'CREATE TABLE IF NOT EXISTS items (id INTEGER PRIMARY KEY, name TEXT, qty INTEGER)'
        );
      }, null, function () {
        statusEl.textContent = 'Ready.';
        document.getElementById('replaceBtn').disabled = false;
        document.getElementById('listBtn').disabled = false;
      });

      document.getElementById('replaceBtn').addEventListener('click', function () {
        clicks += 1;
        db.transaction(function (tx) {
          tx.executeSql(
            'INSERT OR REPLACE INTO items (id, name, qty) VALUES (?, ?, ?)',
            [1, 'Notebook v' + clicks, clicks],
            function (tx, result) {
              statusEl.textContent = 'Upserted; rowsAffected = ' + result.rowsAffected + '.';
            }
          );
        });
      });

      document.getElementById('listBtn').addEventListener('click', function () {
        db.transaction(function (tx) {
          tx.executeSql(
            'SELECT id, name, qty FROM items WHERE id = ?',
            [1],
            function (tx, result) {
              if (result.rows.length === 0) {
                statusEl.textContent = 'No row with id 1.';
                return;
              }
              var row = result.rows.item(0);
              statusEl.textContent = 'id 1 → ' + row.name + ', qty ' + row.qty;
            }
          );
        });
      });
    }
  </script>
</body>
</html>
Lines: 0 | Characters: 0
Live Preview Auto-refresh on Run
Web SQL INSERT — INSERT OR REPLACE
