Adds columns to, drops columns from, and changes column attributes in an existing table. Adds, modifies, and drops integrity constraints from an existing table. Restriction: You cannot use any type of ...

In Microsoft Access, you can add records to an existing table that already as data and resize the columns that contain the fields and data.

Doing so will create the custom hierarchies defined by the date table. SEE: Follow along in this guide to add a calculated column in Microsoft Power BI.