# DuckDB vendor-specific interface · access · 2021

Revision 1 (11 October 2026) · Modeled snapshot · through 8 October 2026.

All figures are research-informed estimates of analytical activity. Significant errors may remain; decimal places do not imply measurement precision.

0.055% of the full access layer.

[DuckDB vendor-specific interface](https://history.columnar.tech/technologies/access/vendor-duckdb.md): historical names and annual shares.

Connections below describe the whole DuckDB engine. Access and storage mixes are estimated separately; they are not a joint interface-to-storage distribution.

## Access use within this engine

| Option | Share of engine activity | Share of full access layer |
| --- | --- | --- |
| [Python DB-API (other drivers)](https://history.columnar.tech/technologies/access/python.md) | 50% | 0.2% |
| [DuckDB vendor-specific interface](https://history.columnar.tech/technologies/access/vendor-duckdb.md) | 18.3% | <0.1% |
| [Other language/portable APIs](https://history.columnar.tech/technologies/access/other-api.md) | 16.7% | <0.1% |
| [JDBC](https://history.columnar.tech/technologies/access/jdbc.md) | 8.3% | <0.1% |
| [Arrow without ADBC](https://history.columnar.tech/technologies/access/arrow.md) | 6.7% | <0.1% |

## Storage use within this engine

| Option | Share of engine activity | Share of full storage layer |
| --- | --- | --- |
| [Standalone Parquet on local/shared filesystems](https://history.columnar.tech/technologies/storage/parquet-local.md) | 45% | 0.1% |
| [DuckDB native storage](https://history.columnar.tech/technologies/storage/native-duckdb.md) | 25% | <0.1% |
| [Local/shared row files](https://history.columnar.tech/technologies/storage/legacy-local.md) | 25% | <0.1% |
| [Standalone Parquet on object storage](https://history.columnar.tech/technologies/storage/parquet-object.md) | 5% | <0.1% |

[All percentages for 2021](https://history.columnar.tech/years/2021.md)

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[Markdown overview](https://history.columnar.tech/index.md) · [Interactive visualization](https://history.columnar.tech/?2021) · [Methodology](https://history.columnar.tech/methodology.md) · [Terms of use](https://history.columnar.tech/terms.md)

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