Hi TaeWook,
Greetings from Syncfusion support.
Query: “i want to use "aggregates" how to solve it?”
We have built-in support to show aggregates in Grid component. We request you to refer the below UG documentation and online demo for your reference
Please get back to us if you have further queries or if we misunderstood your query.
Regards,
Vignesh Natarajan