Flagging First Duplicate Entries in Oracle SQL using Row Numbers or CTEs

Extracting Specific Substrings from IDs in BigQuery Using SUBSTR Function

Fixing the Case Expression in SQL Server: A Guide to Searched Case Expressions

Mastering SQL GROUP BY: How to Filter Sessions by Multiple Interactions

Optimizing Joins: How to Get a Distinct Count from Two Tables

Aggregating Data from Multiple Rows with the Same Key in ClickHouse

Mastering Dynamic SQL: A Powerful Tool for Adaptable Queries in Oracle SQL

Understanding and Analyzing Database Schema Definitions in MySQL

## Mastering Comma-Joining and CROSS JOINs in Oracle SQL

Understanding the Challenge of Inserting a Value from a Select Statement for a Non-Identity Column: Solutions for SQL Server and Oracle Databases