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.
Deardurff
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.
Concurrency: Phantom Reads
A closer look at the Serializable Transaction Isolation Level and how it could prevent Phantom Reads concurrency issues in SQL Server.
Concurrency: Inconsistent Analysis
A closer look at the Repeatable Read Transaction Isolation Level and how it could help with Inconsistent Analysis concurrency issues in SQL Server.
Concurrency: Lost Updates
A closer look at the Read Committed Transaction Isolation Level and how it could allow Lost Update concurrency issues in SQL Server.
Concurrency: Dirty Reads
A closer look at the Read Uncommitted Transaction Isolation Level and how it could allow Dirty Reads in SQL Server.
IDENTITY Columns
How to use IDENTITY columns in a table. An IDENTITY field is very similar to an auto-number field, where the number will automatically be added as each record is inserted.
SQL Four-Part Names
The four-part names of SQL Server objects. How to reference objects in SQL Server by their four-part name and how to use it in a T-SQL statement.
Restore and Recovery
The restoration process of a SQL Server database passes through two phases: Restore and Recovery.