SQLite
http://www.w3schools.com/sql/default.asp

Transfer or populate sqlite table to another table
INSERT INTO TABLE2 (COL1, COL2, COL3) SELECT COL1, COL4, COL7 FROM TABLE1

Select only different DXCC
select count (distinct dxcc) from log

DELETED ENTITIES:
http://www.ng3k.com/Dxcc/dxccde.html

PROCESS to add a new ADIF field:
1.- Add it to: bool DataBase::createTableLog(bool temp)
2.- Ensure the bool DataBase::updateIfNeeded() runs to update the log table
3.- class QSO (.h)
     - Add the variable:    altitude
     - Add the set & get:
                bool setAltitude(const double _c);
                double getAltitude();setAltitude / getAltitude
     - Add the helper:
                bool setAltitude(const QString &data);

3.- class QSO (.cpp)
    - Implement the setters/getter
    - clear() (add the variable)
    - Add it to:
        - void QSO::InitializeHash()
        - QString QSO::getAddQueryString()
        - QString QSO::getModifyQueryString()
        - QSqlQuery QSO::getPreparedQuery(const QString &_s)
        - QString QSO::getADIF()
        - bool QSO::fromDB(int _qsoId)

4.- class ADIF (.cpp)
        Add it to:
            - void Adif::InitializeHash()
