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If you have developer access, check out the documentation on using the
type: durationparameter with a dimension group to easily calculate interval-based durations.
I have two dates and I would like to know how much time has elapsed between them. I might want to know this result in days, months, or years.
Looker's table calculations offer a simple way to compute the difference between two dates on the fly. The
diff_days family of functions compares two dates and returns the difference between them as an integer.
Example 1: Difference Between Two Fields
Each of the orders in the table below has a created and returned date. We can use a table calculation with the
diff_days function to compute the number of days that elapsed between purchase and return:
Example 2: User Account Age
Each of the users listed below has a sign-up date. We can use a table calculation with the
diff_months function to find out how many months have elapsed from when the users signed up (
users.created_date) to today (which can be returned with
Example 3: Time Between Events
Building off the previous example, let's assume the company was founded on November 30, 2011, and we want to find out how old the company was when each user signed up, in years. I can use the
diff_years function, and the
date function to compare the sign-up date (November 30, 2011) against a hard-coded date (