Read Committed Isolation

Read Committed Isolation — A transaction isolation level in which each statement reads only committed data, while repeated reads may observe newer committed versions.

Database Context

Read Committed prevents dirty reads but does not generally guarantee repeatable reads or eliminate phantoms. Concrete behavior differs between lock-based and MVCC databases, so application correctness should be based on the database's documented semantics rather than the name alone.

Related Database Concepts

• MVCC
• non-repeatable read
• phantom read
• transaction