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diff --git a/examples/quickcontrols/chattutorial/chapter4/sqlconversationmodel.cpp b/examples/quickcontrols/chattutorial/chapter4/sqlconversationmodel.cpp
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+++ b/examples/quickcontrols/chattutorial/chapter4/sqlconversationmodel.cpp
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+// Copyright (C) 2017 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "sqlconversationmodel.h"
+
+#include <QDateTime>
+#include <QDebug>
+#include <QSqlError>
+#include <QSqlRecord>
+#include <QSqlQuery>
+
+static const char *conversationsTableName = "Conversations";
+
+static void createTable()
+{
+    if (QSqlDatabase::database().tables().contains(conversationsTableName)) {
+        // The table already exists; we don't need to do anything.
+        return;
+    }
+
+    QSqlQuery query;
+    if (!query.exec(
+        "CREATE TABLE IF NOT EXISTS 'Conversations' ("
+        "'author' TEXT NOT NULL,"
+        "'recipient' TEXT NOT NULL,"
+        "'timestamp' TEXT NOT NULL,"
+        "'message' TEXT NOT NULL,"
+        "FOREIGN KEY('author') REFERENCES Contacts ( name ),"
+        "FOREIGN KEY('recipient') REFERENCES Contacts ( name )"
+        ")")) {
+        qFatal("Failed to query database: %s", qPrintable(query.lastError().text()));
+    }
+
+    query.exec("INSERT INTO Conversations VALUES('Me', 'Ernest Hemingway', '2016-01-07T14:36:06', 'Hello!')");
+    query.exec("INSERT INTO Conversations VALUES('Ernest Hemingway', 'Me', '2016-01-07T14:36:16', 'Good afternoon.')");
+    query.exec("INSERT INTO Conversations VALUES('Me', 'Albert Einstein', '2016-01-01T11:24:53', 'Hi!')");
+    query.exec("INSERT INTO Conversations VALUES('Albert Einstein', 'Me', '2016-01-07T14:36:16', 'Good morning.')");
+    query.exec("INSERT INTO Conversations VALUES('Hans Gude', 'Me', '2015-11-20T06:30:02', 'God morgen. Har du fått mitt maleri?')");
+    query.exec("INSERT INTO Conversations VALUES('Me', 'Hans Gude', '2015-11-20T08:21:03', 'God morgen, Hans. Ja, det er veldig fint. Tusen takk! "
+               "Hvor mange timer har du brukt på den?')");
+}
+
+SqlConversationModel::SqlConversationModel(QObject *parent) :
+    QSqlTableModel(parent)
+{
+    createTable();
+    setTable(conversationsTableName);
+    setSort(2, Qt::DescendingOrder);
+    // Ensures that the model is sorted correctly after submitting a new row.
+    setEditStrategy(QSqlTableModel::OnManualSubmit);
+}
+
+QString SqlConversationModel::recipient() const
+{
+    return m_recipient;
+}
+
+void SqlConversationModel::setRecipient(const QString &recipient)
+{
+    if (recipient == m_recipient)
+        return;
+
+    m_recipient = recipient;
+
+    const QString filterString = QString::fromLatin1(
+        "(recipient = '%1' AND author = 'Me') OR (recipient = 'Me' AND author='%1')").arg(m_recipient);
+    setFilter(filterString);
+    select();
+
+    emit recipientChanged();
+}
+
+QVariant SqlConversationModel::data(const QModelIndex &index, int role) const
+{
+    if (role < Qt::UserRole)
+        return QSqlTableModel::data(index, role);
+
+    const QSqlRecord sqlRecord = record(index.row());
+    return sqlRecord.value(role - Qt::UserRole);
+}
+
+QHash<int, QByteArray> SqlConversationModel::roleNames() const
+{
+    QHash<int, QByteArray> names;
+    names[Qt::UserRole] = "author";
+    names[Qt::UserRole + 1] = "recipient";
+    names[Qt::UserRole + 2] = "timestamp";
+    names[Qt::UserRole + 3] = "message";
+    return names;
+}
+
+void SqlConversationModel::sendMessage(const QString &recipient, const QString &message)
+{
+    const QString timestamp = QDateTime::currentDateTime().toString(Qt::ISODate);
+
+    QSqlRecord newRecord = record();
+    newRecord.setValue("author", "Me");
+    newRecord.setValue("recipient", recipient);
+    newRecord.setValue("timestamp", timestamp);
+    newRecord.setValue("message", message);
+    if (!insertRecord(rowCount(), newRecord)) {
+        qWarning() << "Failed to send message:" << lastError().text();
+        return;
+    }
+
+    submitAll();
+}