SQL Server Table-Valued Parameter Join Issues in Stored Procedures

Learn how table valued parameter joins in SQL Server stored procedures can negatively impact query performance.

Net Present Value and Internal Rate of Return in SQL Server

Many organizations store cash-flow data inside SQL Server and decision-makers often need metrics like Net Present Value (NPV) and Internal Rate of Return (IRR) to evaluate those cash flows. Is it possible to calculate NPV and IIR values in SQL Server without the use of external tools?

Understanding Deadlock Victim Selection in SQL Server

A short introduction to how deadlocks work and how you can affect their behavior inside your system.

T-SQL Trigonometric Functions in SQL Server

Introduction SQL Server includes several built-in mathematical functions that allow developers to perform complex calculations directly within queries. Among these are trigonometric functions such as SIN(), COS(), and TAN(), which are useful in scenarios involving engineering calculations, geographic data processing, simulations, and analytics. Although these functions are straightforward to use, developers occasionally encounter unexpected results […]

T-SQL in SQL Server 2025: JSON_ARRAYAGG

Learn how the JSON_ARRAYAGG() function works in SQL Server 2025.

Multiple Sequence Values

Creating a JSON Document II

Every Database Has Problems

The magic way to get better performance from your system is to write better code from the start.

Identities and Sequences V

Creating a JSON Document I