Conditional Aggregation in SQL: Handling Multiple Invoices per Employee and Office

Converting Columns to Rows Using SQL Server's CROSS APPLY and VALUES Function

Improving Concurrency in Database Procedures: A Better Approach Than Traditional Transactions

Understanding SQL Server's Conditional Aggregation: A Deeper Dive into Q1 and Q5

Pivot Table Transformation: A Step-by-Step Guide to Aggregating Data Based on Conditions

Filtering Data Within a Specific Time Period Using SQL Server Date and Time Functions

Refactoring Hardcoded Values in SQL Functions for Improved Maintainability

Creating Custom Tables with JOINS: A Practical Guide for SQL Beginners

Mastering Table-Valued Parameters: A Powerful Tool for Optimizing Database Queries in Microsoft SQL Server

Subquery Limitations and Workarounds: A Deep Dive into Performance, Readability, and Error Handling