Transaction

https://en.wikipedia.org/wiki/Isolation_(database_systems)

aerospike:https://aerospike.com/blog/developers-understanding-aerospike-transactions/

datomic: https://docs.datomic.com/on-prem/transactions/transactions.html

MySQL:https://dev.mysql.com/doc/refman/8.0/en/innodb-locking-transaction-model.html

PostgreSQL:https://www.postgresql.org/docs/14/mvcc.html K Oracle

SQL Server2012: https://docs.microsoft.com/en-us/sql/relational-databases/sql-server-transaction-locking-and-row-versioning-guide?view=sql-server-ver15#database-engine-isolation-levels

FoundationDB:https://apple.github.io/foundationdb/transaction-manifesto.html

Access

MemSQL(singlestore):https://dbdb.io/db/singlestore