category
A category is a way to group data in a table based on shared values in a column (called the source column). For example, if your company is tracking shirt sales, you might choose to organize your data by the date of the sale. Sale Date is the category.
![A categorized table](https://help.apple.com/assets/65E6150B6FF3556065071CF8/65E6150C60D78F13600351D8/en_US/024bf88906a180f4125b5e5bddbbdd8e.png)
A table can have a hierarchy of categories and subcategories; one main category and up to four subcategories.