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---
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license: mit
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---
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## Database Card: SchemaPile
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**Dataset Name:** SchemaPile
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**Source File:** `schemapile-perm.json.gz`
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**Format:** JSON Lines (`data.jsonl`), generated via `convert_to_hf.py`
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### Description
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SchemaPile is a collection of database schemas extracted from various sources, normalized for consistency and ease of use in machine learning workflows. Each record contains metadata (`INFO`), licensing information, permissiveness, and a list of tables with detailed column specifications.
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### Schema
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- **INFO:**
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- `ID`: Unique identifier (from filename prefix)
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- `FILENAME`: Original filename
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- Additional metadata fields
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- **LICENSE:** License string (if available)
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- **PERMISSIVE:** Boolean indicating permissive license
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- **TABLES:** List of tables, each with:
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- `TABLE_NAME`: Name of the table
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- `COLUMNS`: List of columns, each with:
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- `NAME`, `TYPE`, `NULLABLE`, `UNIQUE`, `DEFAULT`, `CHECKS`, `IS_PRIMARY`, `IS_INDEX`, `VALUES`
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- `PRIMARY_KEYS`, `FOREIGN_KEYS`, `CHECKS`, `INDEXES`
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### Citation
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If you use SchemaPile in your research, please cite:
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> ```bibtex
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> @article{dohmen2024schemapile,
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> title={Schemapile: A large collection of relational database schemas},
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> author={D{"o}hmen, Till and Geacu, Radu and Hulsebos, Madelon and Schelter, Sebastian},
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> journal={Proceedings of the ACM on Management of Data},
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> volume={2},
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> number={3},
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> pages={1--25},
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> year={2024},
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> publisher={ACM New York, NY, USA}
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> ```
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**[Read the paper](https://schemapile.github.io/assets/SchemaPile.pdf)**
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### Website
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For more information, visit the [SchemaPile website](https://schemapile.github.io/).
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### License
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See individual record `LICENSE` fields for details. The `PERMISSIVE` flag indicates whether the schema is under a permissive license.
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