[Pinguinn]

The 2nd problem is because you are only saving a number
Try this

pawn Код:

new name[MAX_PLAYER_NAME];
    GetPlayerName(playerid, name, sizeof name);
    format(s, sizeof(s), "INSERT INTO numbers (username, number) VALUES ('%s', '%d')", name, number2);
    mysql_query(s);

For the first problem, do you connect to MySQL?