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# Data Sources
<web-summary>
Discover all the data formats Kotlin DataFrame can work with — including JSON, CSV, Excel, SQL databases, and more.
</web-summary>
<card-summary>
Explore supported data sources in Kotlin DataFrame and how to integrate them into your data processing workflow.
</card-summary>
<link-summary>
Explore supported data sources in Kotlin DataFrame and how to integrate them into your data processing workflow.
</link-summary>
One of the key aspects of working with data is being able to read from and write to various data sources.
Kotlin DataFrame provides seamless support for a wide range of formats to integrate into your data workflows.
Below you'll find a list of supported sources along with instructions on how to read and write data using them.
- [JSON](JSON.md)
- [OpenAPI](OpenAPI.md)
- [CSV / TSV](CSV-TSV.md)
- [Excel](Excel.md)
- [Apache Arrow](ApacheArrow.md)
- [Parquet](Parquet.md)
- [SQL](SQL.md):
- [PostgreSQL](PostgreSQL.md)
- [MySQL](MySQL.md)
- [Microsoft SQL Server](Microsoft-SQL-Server.md)
- [SQLite](SQLite.md)
- [H2](H2.md)
- [MariaDB](MariaDB.md)
- [DuckDB](DuckDB.md)
- [Custom SQL Source](Custom-SQL-Source.md)
- [Custom integrations with unsupported data sources](Integrations.md)