Published 16. December 2019
Updated October 2025
KeepTool’s ER Diagrammer (part of the Enterprise edition) lets you automatically generate a clean, well-organized Entity-Relationship diagram from your Oracle database — instantly.
This tool is ideal for:
Data modeling
Understanding legacy schemas
Documenting database structure
Instead of forcing you to generate a huge all-tables diagram, the updated ER Diagrammer now supports subset / focus diagrams:
Start from a central table, and automatically include its related master, detail, and sub-detail tables
Create multiple, more manageable views rather than a massive “super-diagram”
Work from clear, focused portions of your schema for better clarity and performance
This makes exploring and documenting large schema structures much more manageable.
One of the neat enhancements: you can now generate HTML documentation for the tables currently shown in your ER diagram.
How it works:
Click the DB-Doc button
KeepTool passes all table names in the diagram as a filter to the DB-Doc tool
You get a matching HTML description of those tables, ready to paste into your technical documentation
The diagram and verbal table descriptions stay in sync
Big schemas become digestible via subset diagrams
You can immediately document exactly what you show, not the entire schema
Developers, DBAs, and system analysts get powerful tools to explore, document, and understand databases
The tool reflects real customer needs — enhancements were driven by user feedback
ER diagram creation becomes almost effortless with KeepTool’s ER Diagrammer — just analyze and let the tool do the layout work.
Explore the power of automated ER diagramming:
KeepTool's Oracle tools are designed specifically for developers, DBAs, and support teams.
Based on over 25 years of experience, we continuously optimize our software to make your database analysis and documentation faster, more efficient, and clearer.