# Schema

[back to index](../README.md)

The core database tables that every jsonderulo compliant server needs and how the server should auto manage certain columns.

## Pages

- [Core Tables](core_tables.md) the required tables (users, groups, settings, associations, sessions)
- [System Columns](system_columns.md) auto managed columns that jde adds to your tables
- [Sessions](sessions.md) how persistent sessions work under the hood