MySQL Enterprise Audit provides detailed logs of database activities, which are essential for ensuring compliance with regulations like GDPR and HIPAA, helping enterprises track data access and modifications.

Multi-source replication allows a single replica to receive data from multiple primary servers. This is ideal for consolidating data from various sources into a single, unified replica.

The UNIQUE constraint ensures that all values in a column are unique across all rows in a table, preventing duplicates.

Redis is a separate database technology, not a MySQL storage engine. InnoDB, MyISAM, and NDB are all valid storage engines supported by MySQL.

The BLOB datatype is designed to store binary large objects, such as images, audio files, or other multimedia content.