nocodb/packages/noco-docs/docs/030.setup-and-usages/080.rollup.md

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Rollup	Understanding Rollup Column!

Sample Organization structure:

• 5 Departments, each department has a team name & associated team code
• 5 employees working at different Departments
• Teams has many Employees : relationship has been defined

RollUp AGGREGATION functions supported

• Count
• Minimum
• Maximum
• Average
• Sum
• Count Distinct
• Sum Distinct
• Average Distinct

Now, we can explore how to extract cumulative information using "ROLLUP" columns

Adding a rollup column

• Click on '+' icon to the left of column headers
• Feed column name
• Select Column type as 'Rollup'
• Choose Child Table
• Choose on ​Child column for aggregation
• Select ​Aggregate function
• Click on Save

Rollup column will be populated with appropriate information