Super Columns in Column-Family Databases:
Asuper columnis a higher-level construct used incolumn-family NoSQL databases(like Apache Cassandra).
It groups related columns together under a single name, forming atwo-level hierarchywithin a column family.
* This structure is useful when storing data that naturally fits anested or hierarchical format.
* For example, a user profile might contain super columns like "Address" (with sub-columns like
"Street", "City", "ZIP") and "Contacts" (with sub-columns like "Phone", "Email").
Why the other options are incorrect:
* A:A regular column represents a single value associated with a row key.
* C:Primary keys are defined at the row level, not using super columns.
* D:While BLOBs can be stored, the primary role of a super column is togroup related columns, not store binary data.