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---
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title: "Rollup"
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description: "Understanding Rollup Column!"
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---
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## Rollup
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Sample Organization structure:
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- 5 Departments, each department has a team name & associated team code
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- 5 employees working at different Departments
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- Teams **has many** Employees : relationship has been defined
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### RollUp AGGREGATION functions supported
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- Count
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- Minimum
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- Maximum
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- Average
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- Sum
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- Count Distinct
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- Sum Distinct
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- Average Distinct
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Now, we can explore how to extract employee count information per team using **"ROLLUP"** columns
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## Adding a rollup column
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#### 1. Add new column
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Click on '+' icon to the left of column headers in Departments table
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<!--  -->
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#### 2. Feed column name
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<!--  -->
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#### 3. Select Column type as 'Rollup'
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<!--  -->
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#### 4. Choose Child Table
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Table Employee in our example
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<!--  -->
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#### 5. Choose on Child column
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Pick appropriate column for aggreagation
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<!--  -->
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#### 6. Select Aggregate function
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Aggregate function will be "count" in our case
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<!--  -->
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#### 7. Click on Save
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<!--  -->
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Column `Employee Count` is populated with appropriate information
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