SQL Transaction Management and Concurrency Control

Introduction to SQL Transactions

SQL transactions are fundamental for ensuring data integrity in database systems. This section provides an introduction to the concepts and benefits of using transactions.

• What is a Transaction?
• Transaction States
• Undo and Rollback

ACID Properties

The ACID properties are essential characteristics of transactions that guarantee reliability.

• Atomicity
• Consistency
• Isolation
• Durability

Isolation Levels

Isolation levels control the degree to which transactions are isolated from each other. Choosing the right level is crucial for performance and data integrity.

• Read Uncommitted
• Read Committed
• Repeatable Read
• Snapshot Isolation