[Micko123]

Okay so I am new at MySQL and I am following one tutorial for log/reg sys.
I found this

PHP код:

UPDATE `players` SET `deaths` = %d WHERE `id` = %d LIMIT 1 


I understand most of this but what I don't understand is this

PHP код:

WHERE `id` = %d LIMIT 1 


Can someone explain me this limit 1??

Thx in advance