Can Mermaid generate diagrams from SQL?

While Mermaid doesn't connect to databases directly, many third-party tools can export SQL schemas into Mermaid ER diagram syntax.

Mermaid

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Overview

Mermaid is a JavaScript-based diagramming and charting tool that uses a Markdown-inspired text syntax to simplify the creation of complex visualizations. By treating diagrams as code (DaC), Mermaid allows developers and technical writers to integrate visual documentation directly into version-controlled repositories, ensuring that architectural diagrams evolve alongside the codebase. In the 2026 landscape, Mermaid has become the industry standard for LLM-generated visualizations; nearly every major AI model (GPT-5, Claude 4, etc.) natively outputs Mermaid syntax for technical explanations. The core library is open-source under the MIT license, while the 'Mermaid Chart' commercial entity provides enterprise-grade collaboration features. Its technical architecture leverages d3 and dagre-d3 for rendering, supporting a wide array of diagram types including flowcharts, sequence diagrams, Gantt charts, class diagrams, and Git graphs. As documentation shifts toward automation, Mermaid's ability to be rendered on-the-fly via CLI, CI/CD pipelines, or browser-side scripts makes it indispensable for modern DevOps and software engineering workflows.

Common tasks

Software architecture mapping Automated documentation rendering Database schema visualization Project timeline management

FAQ

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Does Mermaid support dark mode?

Yes, Mermaid has built-in themes including 'dark', 'default', 'forest', and 'neutral' that can be toggled via the initialization config.

Can I use Mermaid in MS Word or PowerPoint?

Direct support is not native, but you can export Mermaid diagrams as high-resolution PNG or SVG files and insert them into Office documents.

Is Mermaid truly free?

The core library is 100% free and open-source under the MIT license. Only the Mermaid Chart collaboration platform has paid tiers.

How do I handle very large diagrams?

For large diagrams, it is recommended to use the 'subgraph' feature to group elements or use the Mermaid CLI to render directly to SVG to avoid browser performance bottlenecks.

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