Two calendars required or not?

[#1]

hi community,

i'm having a bit of trouble getting my head round how to structure some data.

Currently I have a very simple data structure with 3 tables

UserSessionDetails - this table records a user's session when they log into our software

UserSignatures - this table hold details on those users, such as when the login was created.

This enables me to produce a simple chart showing the number of unique users loggin in each week.

However, the problem arises when I need to show the % of total users logging in over time. To do this I need to use the CreatedDate field in the UserSignature table, because i need to know how many users existed at a certain point in time.

What is the best way to do this? Do I need separate calendars? One for UserSignature.CreatedDate and another one for SessionStartedDate?

[MK_QSL · Accepted solution]

Create Two Different Calendar for SessionStartedDate and UserSignature.CreatedDate to use these two tables individually.

If you want to use both above dates in a single table or chart, you need to create a third Master Calendar (i.e Canonical Date)

Check below link for better understanding ....

Hope this helps..

http://community.qlik.com/blogs/qlikviewdesignblog/2014/02/17/canonical-date