Understanding ACID Properties in SQL Server Transactions

Implement a Bank Transfer Transaction

Write a SQL Server transaction that transfers funds between two accounts, ensuring all ACID properties are met.

Expected output: A transaction that either completes both debit and credit or rolls back on failure.

Hint: Use BEGIN TRANSACTION, COMMIT, and ROLLBACK with error checking.

Experiment with Isolation Levels

Create two concurrent transactions and observe the effects of different isolation levels on data visibility.

Expected output: Understanding of how isolation levels affect concurrency and data consistency.

Hint: Use SET TRANSACTION ISOLATION LEVEL and test for dirty reads or phantom reads.

Atomicity ensures that all operations within a transaction are completed successfully as a single unit, or none are applied if any operation fails.

SQL Server enforces Durability by writing transaction logs to stable storage before committing, ensuring that committed transactions survive system failures.

Higher isolation levels reduce concurrency and increase locking, which can lead to decreased performance but provide stronger consistency guarantees.