Qlik Community

Qlik Sense App Development

Discussion board where members can learn more about Qlik Sense App Development and Usage.

Not applicable

Distinct sum over rolling period

Dear community

I'd be very greatful to receive some help, figuring out the following (for me) very challenging problem:

In broadcasting, we use the unit "Reach" to describe the share of viewers who have seen (at least one minute) of a program during the last X days. So imagine a table with the following columns, each record representing one minute of one viewer watching my TV channel:

  • DateTime (date & hour & minute)
  • ViewerID (let's assume that we have a universe of 1000 viewers, each with a unique ID)
  • Weight (not all viewers have the same value. The sum(weight) for all viewers in the universe are 100%. The weights are slightly adjusted for all viewers every day to achieve this.)
  • ProgramName (e.g. "Star trek")

During the last week (X=7), let's say Star trek aired a couple of times. But what is the "Reach"? What function can I use to get Qlik to tell me what share of viewers who have seen at least one minute of Star Trek during the last 7 days? (NB, since the weight is slightly changing every day, I need to use the average weight for each viewer over the 7 days.)

I'm looking forward to seeing some bright ideas on this! Thanks a lot!

Tor

NB: I cannot use set analysis to filter out the last 7 days, because I need to show the development of Reach over a periode, hence the function needs to refer to the last 7 days (rolling).

1 Solution

Accepted Solutions

Re: Distinct sum over rolling period

2 Replies

Re: Distinct sum over rolling period

Not applicable

Re: Distinct sum over rolling period

Thanks, Marcus! With a bit of struggle, I finally solved this with AsOf-tables, as suggested by the article.