Have you had experience working with data grouping operations?

Yes, I have experience working with data grouping operations. Data grouping is often used to aggregate information based on certain keys or categories. For example, in SQL, you can group records by a column and count the number of items in each group:

SELECT category, COUNT(*) AS count
FROM products
GROUP BY category;

In test automation, grouping helps verify the correctness of aggregated data, such as sums or averages obtained from different data sets.