Which are features of a calculated column?

A calculated column is defined as a column that appears in the result set of a query. This feature allows users to perform computations on existing columns within a database table, effectively generating new data points or metrics that can be used for analysis. The calculated column is constructed based on expressions or formulas that derive its value from other columns, and once defined, it can be included in the output of queries.

In the context of other choices, while they indicate relevant aspects of calculated columns, they do not accurately describe the specific features as effectively as the statement about it being part of the result set. The persistence of calculations or the specific nodes where the calculated columns are created are generally applicable but do not capture the main essence of what defines a calculated column in HANA environments, which is fundamentally its presence and utility in query output.