Identifying and Deleting Duplicate Records in SQL Server

Understanding SQL Database Structures and Column Lengths for Optimized Performance and Data Integrity

Composite Primary Keys: Avoiding Duplicate Key Errors Despite Reported Value Not Existing

Selecting the Maximum Date with Multiple Datetime Values: A Comparative Analysis of Two Approaches Using SQL

Create a New Column in SQL Based on Pattern Matching Using Left Join and First Value Function

Understanding Triggers in SQL Server: A Deep Dive into Copying Data Between Tables

Using SQL Queries with Column Values for WHERE Clauses

Understanding SQL Joins: Simplifying Complex Queries with Clarity and Efficiency

Understanding Union Operations in SQL: A Step-by-Step Guide to Correcting Incorrect Results

Identifying Records Repeating Within a Set Time Frame Since Their First Creation in SQL Using Self-Join Method