Properties of Database in WeChat
They have five properties of database in WeChat. Among these are :-
1) Sharing
In WeChat application we can share information to our friends. This side we call Moments. We can share our fell, out picture, our education, our information and else. Only our friends can see and comment our moments.
2) Reduce Redundancy Data
WeChat also can reduce redundancy data with create the group chat. In group chat we can share the same message to many friends. So, in the same time we can avoid give the same message to our friend. Otherwise, in contact list we can't use the same number phone in one time with another phone.
3) Avoid Inconsistency
Avoid inconsistency is like user name and password. If we input wrong username and password, the system will pass to our data and we must input the correct username and password. So username is unique and one username is one person.
4) Integrity
Integrity in WeChat is like all about our detail must right not the fake data. However, user can block contact if we don't know who is they.
5) Involve Transaction
WeChat must involve transaction because if they don't have, friends in WeChat can't replay the message, comment, accept the video call, voice call and so on. So this is the transaction have involved in this application.