The rollup allows you to perform a calculation on an entire column or a Relation. The most basic computation for the rollup is Count.
For example, in the image below we create a rollup column that counts the number of items in the
Column or relation source
You can perform a calculation on values in a column or a Relation Column. For example, in the app below we have a list of users with a relation.
The Rollup Column can perform different calculations based on the data it finds in the column or relation you select.
The rollup column can calculate the Count , Count Unique, Sum, Average, Range, Minimum and Maximum of number values in a column or relation.
The Rollup Column can calculate the Count, Count Unique, Earliest and Latest of date values in a column or relation.
The Rollup Column can calculate the Count, Count Unique, Count True, Count False, All True, Some True
The Rollup Column can calculate Count or Count Unique
You can use the rollup in many ways. Our expense splitter template also uses the rollup column to calculate the Sum & Count of different columns.