[Sergei]

Код:

format(query, 256,"SELECT * FROM `jogadores` WHERE nome = '%s'",PlayerName(playerid));

Код:

format(query, 256, "INSERT INTO `jogadores`(nome, some, someelse, ...) VALUES (NULL, '%s', '%s', %d, %d, %d, %d)", PlayerName(playerid), senha, 0, 4000, 0, 0);

You lack of general SQL knowledge. I suggest you to read some tutorials here: http://www.w3schools.com/sql/default.asp