One of the most common non-relational databases. Wide-column databases, also known as column family databases, are a particular kind of NoSQL database in which the names and formats of the columns can differ between rows, even within the same table. The fact that data is organized into columns makes it possible to search and load the full column rapidly when a query is made for a specific value in a column. Examples include Apache Cassandra, ScyllaDB and Apache Parquet.