Understanding SQL Server: Denormalization and Window Functions for Analyzing Absence Records

Understanding the Performance Issue with NOT EXISTS Query and REPLACE Operation: How to Optimize Your SQL Queries for Better Performance

SQL Window Functions for Aggregate Calculations with the COALESCE and MAX Approach

Using SQL LAG Function to Calculate Sums of Consecutive Rows

Encrypting Columns in SQL Server 2012: A Step-by-Step Guide to GDPR Compliance

Understanding SQL Joins and Subqueries for Complex Queries: A Guide to Solving Tough Problems in Databases.

Masking Data in Stored Procedures: A Step-by-Step Guide for SQL Server Users

Calculating Average Cost Over Date Range with Latest Cost in Single SQL Query

How to Retrieve Client Phone Number from a Database with Multiple Alternatives

Creating SQL Triggers for After Update/Insert Operations: A Comprehensive Guide