Performance Tuning

Concurrency: Dirty Reads

A closer look at the Read Uncommitted Transaction Isolation Level and how it could allow Dirty Reads in SQL Server.


What are Locks?

What is a Lock? What is the process that transactions use to lock records to provide transaction isolation.


Transaction Isolation Levels

Transaction Isolation Levels are used to control data access concurrency. Concurrency controls can be Pessimistic or Optimistic.


Transactions and Errors

SQL Transaction and Error Handling? What is the difference between Auto-Commit and Explicit Transactions and how transaction effect Errors and Exception Handling?


What are Transactions?

The ACID properties of SQL Transactions, What are the different ACID properties of a transaction how they ensure that data is Atomic, Consistent, Isolated, and Durable.