Using Spring Data JPA's "ON DUPLICATE KEY UPDATE" Feature with Identity Columns for Efficient Database Updates

Achieving the Desired Result in SQL Server and PostgreSQL: A Detailed Explanation of EXISTS Clause and Window Function Approaches to Check Record Existence Based on Conditions.

Understanding Date and Time Formats in SQL Server

Finding Continuous Chains from a SQL Table: A Recursive Approach

Conditional GROUP BY with Dynamic Report IDs Using T-SQL in Stored Procedures

Understanding Parameterized Queries in PyODBC with Examples

Custom Ranks and Highest Dimensions in SQL: A Comprehensive Guide

Parameter Handling in Stored Procedures: A Comprehensive Guide to Simplifying Complex Logic

Optimizing Queries with SELECT COUNT(DISTINCT CASE WHEN ... THEN ... ELSE NULL END) and GROUP BY for Improved Performance in SQL.

How to Retrieve Maximum Value Based on Join Conditions: A Step-by-Step Guide to Filtering Latest Rate for Each Employee While Ensuring Week Before Target Week