[Roel]

Код:

new query[128];
format(query,sizeof(query),"UPDATE `tablename` SET level='%d' WHERE username='%s'",PlayerInfo[player1][Level],PlayerName2(player1));
mysql_query(query);

Edit the 'tablename' to the name of your table. and also you need to have the level and username collum inside that table else it won't work.