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diff --git a/sources/pyside2/doc/tutorials/portingguide/chapter1/initdb.h b/sources/pyside2/doc/tutorials/portingguide/chapter1/initdb.h
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--- a/sources/pyside2/doc/tutorials/portingguide/chapter1/initdb.h
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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef INITDB_H
-#define INITDB_H
-
-#include <QtSql>
-
-void addBook(QSqlQuery &q, const QString &title, int year, const QVariant &authorId,
-             const QVariant &genreId, int rating)
-{
-    q.addBindValue(title);
-    q.addBindValue(year);
-    q.addBindValue(authorId);
-    q.addBindValue(genreId);
-    q.addBindValue(rating);
-    q.exec();
-}
-
-QVariant addGenre(QSqlQuery &q, const QString &name)
-{
-    q.addBindValue(name);
-    q.exec();
-    return q.lastInsertId();
-}
-
-QVariant addAuthor(QSqlQuery &q, const QString &name, const QDate &birthdate)
-{
-    q.addBindValue(name);
-    q.addBindValue(birthdate);
-    q.exec();
-    return q.lastInsertId();
-}
-
-const auto BOOKS_SQL = QLatin1String(R"(
-    create table books(id integer primary key, title varchar, author integer,
-                       genre integer, year integer, rating integer)
-    )");
-
-const auto AUTHORS_SQL =  QLatin1String(R"(
-    create table authors(id integer primary key, name varchar, birthdate date)
-    )");
-
-const auto GENRES_SQL = QLatin1String(R"(
-    create table genres(id integer primary key, name varchar)
-    )");
-
-const auto INSERT_AUTHOR_SQL = QLatin1String(R"(
-    insert into authors(name, birthdate) values(?, ?)
-    )");
-
-const auto INSERT_BOOK_SQL = QLatin1String(R"(
-    insert into books(title, year, author, genre, rating)
-                      values(?, ?, ?, ?, ?)
-    )");
-
-const auto INSERT_GENRE_SQL = QLatin1String(R"(
-    insert into genres(name) values(?)
-    )");
-
-QSqlError initDb()
-{
-    QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
-    db.setDatabaseName(":memory:");
-
-    if (!db.open())
-        return db.lastError();
-
-    QStringList tables = db.tables();
-    if (tables.contains("books", Qt::CaseInsensitive)
-        && tables.contains("authors", Qt::CaseInsensitive))
-        return QSqlError();
-
-    QSqlQuery q;
-    if (!q.exec(BOOKS_SQL))
-        return q.lastError();
-    if (!q.exec(AUTHORS_SQL))
-        return q.lastError();
-    if (!q.exec(GENRES_SQL))
-        return q.lastError();
-
-    if (!q.prepare(INSERT_AUTHOR_SQL))
-        return q.lastError();
-    QVariant asimovId = addAuthor(q, QLatin1String("Isaac Asimov"), QDate(1920, 2, 1));
-    QVariant greeneId = addAuthor(q, QLatin1String("Graham Greene"), QDate(1904, 10, 2));
-    QVariant pratchettId = addAuthor(q, QLatin1String("Terry Pratchett"), QDate(1948, 4, 28));
-
-    if (!q.prepare(INSERT_GENRE_SQL))
-        return q.lastError();
-    QVariant sfiction = addGenre(q, QLatin1String("Science Fiction"));
-    QVariant fiction = addGenre(q, QLatin1String("Fiction"));
-    QVariant fantasy = addGenre(q, QLatin1String("Fantasy"));
-
-    if (!q.prepare(INSERT_BOOK_SQL))
-        return q.lastError();
-    addBook(q, QLatin1String("Foundation"), 1951, asimovId, sfiction, 3);
-    addBook(q, QLatin1String("Foundation and Empire"), 1952, asimovId, sfiction, 4);
-    addBook(q, QLatin1String("Second Foundation"), 1953, asimovId, sfiction, 3);
-    addBook(q, QLatin1String("Foundation's Edge"), 1982, asimovId, sfiction, 3);
-    addBook(q, QLatin1String("Foundation and Earth"), 1986, asimovId, sfiction, 4);
-    addBook(q, QLatin1String("Prelude to Foundation"), 1988, asimovId, sfiction, 3);
-    addBook(q, QLatin1String("Forward the Foundation"), 1993, asimovId, sfiction, 3);
-    addBook(q, QLatin1String("The Power and the Glory"), 1940, greeneId, fiction, 4);
-    addBook(q, QLatin1String("The Third Man"), 1950, greeneId, fiction, 5);
-    addBook(q, QLatin1String("Our Man in Havana"), 1958, greeneId, fiction, 4);
-    addBook(q, QLatin1String("Guards! Guards!"), 1989, pratchettId, fantasy, 3);
-    addBook(q, QLatin1String("Night Watch"), 2002, pratchettId, fantasy, 3);
-    addBook(q, QLatin1String("Going Postal"), 2004, pratchettId, fantasy, 3);
-
-    return QSqlError();
-}
-
-#endif