Wide column store

A wide column store is a type of key-value database. It uses tables, rows, and columns, but unlike a relational database, the names and format of the columns can vary from row to row in the same table.^[1]

Examples:^[2]

Apache Cassandra
Apache HBase
Apache Accumulo
Hypertable
Sqrrl

References

↑ http://nosqlguide.com/column-store/nosql-databases-explained-wide-column-stores/
↑ http://db-engines.com/en/ranking/wide+column+store

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