5 docs tagged with "databases"

A database management system (DBMS) exists to store data reliably, query it efficiently, and let

Without an index, finding a row that matches a condition means reading every row in the table — a

Once a database is replicated across multiple machines to survive failures and scale reads, it

The relational model, introduced by Edgar F. Codd in 1970, represents all data as relations

A transaction groups multiple reads/writes into a single logical unit of work. ACID —