John Deardurff

Explore SQL Server Page Types and their roles in optimizing performance and managing data storage within your database.

Unlock performance with non-clustered indexes in SQL Server and learn best practices for effective query optimization.

Explore the importance of indexes that cover a query and how they can improve SQL Server performance and eliminate lookups.

Unlock the power of Multi‑Column Indexing in SQL Server to optimize performance and reduce expensive query costs.

Learn about Writing SARGable Expressions in T‑SQL to maximize SQL Server performance and efficiency with your queries.

A closer look at the Serializable Transaction Isolation Level and how it could prevent Phantom Reads concurrency issues in SQL Server.

A closer look at the Repeatable Read Transaction Isolation Level and how it could help with Inconsistent Analysis concurrency issues in SQL Server.

A closer look at the Read Committed Transaction Isolation Level and how it could allow Lost Update concurrency issues in SQL Server.

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

Explore SQL Server locks for transaction isolation to prevent data inconsistencies and ensure smooth database operations.