January 2016
Beginner to intermediate
166 pages
3h 18m
English
Content preview from QlikView Essentials
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The IntervalMatch function
The IntervalMatch function is used to match a single value in a table to an interval or range of values in another table. This scenario occurs in real time when you are trying to match a date in one table, which falls between two dates in another table. Another example will be matching the number of shifts falling in a time period of, say, eight hours.
The IntervalMatch function is also useful in handling slowly changing dimensions (SCD), specifically Type 2.
Slowly changing dimension Type 2 is used to track the historical information of the data. For example, see the following employee records:
Employees with IDs 275 and ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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