Column naming

For projections the key in the projection determines the name of the node, and thus of column in the resulting table. For FHIRpath field paths, however the name must be calculated: The logic here is to use the most specific node name, optionally followed by an index

from Patient
select
    id,
    name.given[0],
    name.family

will result in the columns:

id

given0

family

Multiple values

Due to the nature of FHIRPath and the underlying formats (XMl/JSON), If a row has multiple nodes with the same name, they will form an array together. So, the following query, will only have column, which contains an array with two values:

from Patient
select
    id,
    id: name.given

Rendering

A tool that renders a table for these kinds of values, has no obligation to render those values. You can leave the field empty or display a list values, or even a grid.