Selecting Distinct Rows from a Table Based on Two Columns with Additional Columns Using Subqueries, Joins, and Aggregations

MSSQL Collation for Greek Language: A Step-by-Step Guide to Compatibility with PHP

Grouping by Previous Date Values: A Deep Dive into SQL Techniques

Transforming Imported Data Using Lookup: A Step-by-Step Guide to SQL Server Transformations

How to Handle Duplicate Data in SQL: Using Various Techniques for Clean Data Sets

Troubleshooting Permission Errors When Creating Databases in SQL Server 2012 Using SQL Server Authentication

Understanding Variable Declaration in Stored Procedures: Best Practices and Limitations