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Creating a database table in Qt

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* Qt is installed on your platform.
 
* Qt is installed on your platform.
 
** S60:
 
** S60:
*** Download Qt for S60 release from here: [http://pepper.troll.no/s60prereleases/ Qt for S60 pre-release]
+
*** Download Qt for S60 release from here: [http://developer.qt.nokia.com/wiki/Support_for_Symbian Qt for S60 pre-release]
 
*** Install Qt for S60: [[Installing Qt on S60]]
 
*** Install Qt for S60: [[Installing Qt on S60]]
*** Check this link for installation guide: [http://pepper.troll.no/s60prereleases/doc/install-s60.html How to install the package]
+
*** Check this link for installation guide: [http://developer.qt.nokia.com/wiki/Support_for_Symbiandoc/install-s60.html How to install the package]
 
*** Qt for S60 Tower release has SQLite support. The required libraries are built into the Qt release.
 
*** Qt for S60 Tower release has SQLite support. The required libraries are built into the Qt release.
 
** Maemo:
 
** Maemo:

Revision as of 14:32, 26 May 2011

Template:KBCS

Article Metadata
Tested with
Devices(s): Nokia 5800 XpressMusic, Nokia N900
Compatibility
Platform(s): Qt
Symbian
Article
Keywords: QSqlDatabase, QSQlite, QSqlError, QSqlQuery
Created: (24 Nov 2009)
Last edited: hamishwillee (26 May 2011)

Contents

Overview

This example shows you how to create a 'person' table in an SQLite database in Qt.

The table 'person' has the following columns:


Preconditions


For Maemo SQLite development, the following packages must be installed:

  • libqt4-sql
  • libqt4-sql-sqlite
  • libsqlite3-0
  • libsqlite3-dev


Header

#include <QObject>
#include <QSqlDatabase>
#include <QSqlError>
#include <QSqlQuery>
 
class DatabaseManager : public QObject
{
public:
DatabaseManager(QObject *parent = 0);
~DatabaseManager();
 
public:
bool openDB();
bool createPersonTable();
 
private:
QSqlDatabase db;
};


Source

Create the 'person' table.

bool DatabaseManager::createPersonTable()
{
// Create table "person"
bool ret = false;
if (db.isOpen())
{
QSqlQuery query;
ret = query.exec("create table person "
"(id integer primary key, "
"firstname varchar(20), "
"lastname varchar(30), "
"age integer)");
 
}
return ret;
}

The rest of the code:

bool DatabaseManager::openDB()
{
// Find QSLite driver
db = QSqlDatabase::addDatabase("QSQLITE");
 
#ifdef Q_OS_LINUX
// NOTE: We have to store database file into user home folder in Linux
QString path(QDir::home().path());
path.append(QDir::separator()).append("my.db.sqlite");
path = QDir::toNativeSeparators(path);
db.setDatabaseName(path);
#else
// NOTE: File exists in the application private folder, in Symbian Qt implementation
db.setDatabaseName("my.db.sqlite");
#endif
 
// Open databasee
return db.open();
}


Postconditions

The database table 'person' is created.


See also

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