Conditional Aggregation for Distinct Values in SQL: A Practical Guide to Separating Login and Logout Events

Optimizing Complex Joins in SQL Queries: A Step-by-Step Guide to Handling Multiple Tables and Reducing Record Counts.

How to Clean Data by Adding/Removing Characters from a String Based on Conditions in T-SQL

Understanding SQL Server's Extended Properties

Understanding Identity Columns in Transact SQL: A Guide to Auto-Incrementing Primary Keys

Calculating Business Days in SQL: A Step-by-Step Guide to Handling Holidays Across Multiple Regions