我知道复制数据在Nosql中不被认为是错误的.我无法理解的是修改数据以防止异常.

举例说明：

You are organizing a series of poker tournaments. You have players,
locations,and tournament events. As I understand it,a tournament
event might contain a location and a collection of players. It does
not need to have all the player data,but if you want to get the names
and home addresses of everyone going to the next tournament,that info
should be in the tournament collection.

Someone has gotten married and moved,changing their last name and
address. Does the application need to update the player collection and
the tournament collection? Or is my model of the collections wrong? How do
developers “keep track” of where information is duplicated?