How WordPress user data is stored in the database - Users Insights
MySQL Sample Database
Building the optimal user database model for your application - DoneDone
mysql - connecting multiple profile tables to user table - Stack Overflow
User Management Related Tables - Identity Server 5.7.0 - WSO2 Documentation
php - Zend Framework - Handle an application with users and members - Stack Overflow
Learn MySQL: Add data in tables using the INSERT statement
mysql - How to connect each person in a table to another table respectively in a database? - Stack Overflow
sql - How to select records from database table which has to user id (created_by_user, given_to_user) and replace users id by usernames? - Stack Overflow
Database Schema for User Info, Authentication, Authorization