Help database to start

Hi, I downloaded the sample of waterfalls on the "Quote" database project

What has intrigued me is that a *.db file is included in the project.

My question is,

1. is it possible to create a *.db on the fly?

2. someone could kindly provide examples of code do (create a database when the program began)? Given that I couldn't find anywhere on the cascades tutorial page.

Thank you

DatabaseAccessManager::DatabaseAccessManager()
{

    QDir home = QDir::home();

    //Create the db if it doesn't exist.
    if(!QFile::exists(home.absoluteFilePath("Database.db")))
    {
        QFile file(home.absoluteFilePath("Database.db"));

        // Open the file that was created
        if (file.open(QIODevice::ReadWrite)) {
            // Create an SqlDataAccess object
            read_db = new SqlDataAccess(home.absoluteFilePath("Database.db"));

            // Create a table called Employee in the database file
            read_db->execute("CREATE TABLE Table( POST_ID VARCHAR(6) PRIMARY KEY, MINUTES_SINCE_EPOCH INT);");
        }
    }
    else
    {
        //Just set the DB if it exists.
        read_db = new SqlDataAccess(home.absoluteFilePath("Database.db"));
    }
}

Where read_db is a member variable of type SqlDataAccess. You will also not include:

#include
using namespace bb::data;

Edit: this code checks first the database file exists. If it's not it creates the file and creates the database schema (which is just a table in this example). If it does just sets the Member read_db SqlDataAccess variable. You can then use this variable to make queries on with him-> execute the command (in the same way, the CREATE TABLE statement is made). For more information on running queries, see the docs for SqlDataAccess.

Tags: BlackBerry Developers

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