diff --git a/src/gui/confirm_dialog.hpp b/src/gui/confirm_dialog.hpp
index 38a0044..1b930b1 100644
--- a/src/gui/confirm_dialog.hpp
+++ b/src/gui/confirm_dialog.hpp
@@ -19,7 +19,7 @@ class ConfirmDialog : public QDialog
 	~ConfirmDialog() override;
 
 	static DialogCode display(QString const& title, QString const& question,
-							  QString const& cards);
+	                          QString const& cards);
 
 private:
 	std::unique_ptr<Ui::ConfirmDialog> ui;
diff --git a/src/gui/database_editor_widget.cpp b/src/gui/database_editor_widget.cpp
index ec90942..5e199a8 100644
--- a/src/gui/database_editor_widget.cpp
+++ b/src/gui/database_editor_widget.cpp
@@ -246,7 +246,7 @@ class FilteringHeader final : public QHeaderView
 			w->setVisible(true);
 			filters.push_back(w);
 			connect(w, &QLineEdit::textEdited, this,
-					&FilteringHeader::updateTableFilters);
+			        &FilteringHeader::updateTableFilters);
 		}
 		setRegexValidator(*filters[0], "[1-9][0-9]*");
 		connect(this, &FilteringHeader::sectionResized, this,
@@ -433,7 +433,7 @@ DatabaseEditorWidget::DatabaseEditorWidget(QTabWidget& parent,
 		db.setPassword(QString("%1").arg(pass, 0, 16));
 	}
 	fillCardList(db);
-	QSqlQuery q(SQL_QUERY_FIRST_ROW_CODE, db);
+	auto q = buildQuery(db, SQL_QUERY_FIRST_ROW_CODE);
 	execQuery(q);
 	if(q.first())
 		updateUiWithCode(q.value(0).toUInt());
diff --git a/src/gui/main_window.cpp b/src/gui/main_window.cpp
index 81df9f6..f2f24d9 100644
--- a/src/gui/main_window.cpp
+++ b/src/gui/main_window.cpp
@@ -219,8 +219,6 @@ void MainWindow::newDatabase()
 	auto db = QSqlDatabase::addDatabase(SQL_DB_DRIVER, file);
 	db.setDatabaseName(file);
 	setupCleanDatabase(db);
-	bool const isDbOpen = db.open();
-	Q_ASSERT(isDbOpen);
 	addTab(file);
 }
 
@@ -240,7 +238,8 @@ void MainWindow::openDatabase()
 	{
 		auto verify_table = [&](const auto& query_and_result)
 		{
-			auto q = db.exec(query_and_result[0]);
+			auto q = buildQuery(db, query_and_result[0]);
+			execQuery(q);
 			auto record = q.record();
 			auto name_index = record.indexOf("name");
 			auto pk_index = record.indexOf("pk");
@@ -597,8 +596,10 @@ QSqlDatabase MainWindow::clipboardDatabase(bool clear) const
 	Q_ASSERT(db.isValid());
 	if(clear)
 	{
-		db.exec("DELETE FROM datas;");
-		db.exec("DELETE FROM texts;");
+		auto q1 = buildQuery(db, "DELETE FROM datas;");
+		execQuery(q1);
+		auto q2 = buildQuery(db, "DELETE FROM texts;");
+		execQuery(q2);
 	}
 	return db;
 }
@@ -607,8 +608,12 @@ void MainWindow::setupCleanDatabase(QSqlDatabase& db) const
 {
 	bool const isDbOpen = db.open();
 	Q_ASSERT(isDbOpen);
-	db.exec(SQL_QUERY_CREATE_DATAS_TABLE);
-	db.exec(SQL_QUERY_CREATE_TEXTS_TABLE);
+	auto q1 = buildQuery(db, "PRAGMA page_size = 4096;");
+	execQuery(q1);
+	auto q2 = buildQuery(db, SQL_QUERY_CREATE_DATAS_TABLE);
+	execQuery(q2);
+	auto q3 = buildQuery(db, SQL_QUERY_CREATE_TEXTS_TABLE);
+	execQuery(q3);
 }
 
 void MainWindow::closeDatabaseImpl(int index, bool askForUnsavedData)