[Sawalha]

pawn Код:

public OnPlayerDisconnect(playerid, reason)
{
      new name[MAX_PLAYER_NAME]; GetPlayerName(playerid, name, MAX_PLAYER_NAME);
      mysql_format(mysql, query, sizeof query, "SELECT * FROM `players` WHERE `Username`='%s'", name);
      mysql_tquery(mysql, query, "SavePlayerData", "i", playerid);
      return 1;
}

you forgot onplayerdisconnect, thread the query into "SavePlayerData" function to save it when he quits game.