> For the complete documentation index, see [llms.txt](https://docs.lenses.io/latest/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors.md).

# SQL Processors

- [Data formats](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/data-formats.md)
- [Changing data formats](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/data-formats/changing-data-formats.md): Tutorial on how to change the format of data in a Kafka topic from JSON to AVRO with Lenses SQL Processors.
- [Rekeying data](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/data-formats/rekeying-data.md): This page describes a tutorial to rekey data in a Kafka topic with Lenses SQL Processors.
- [Controlling AVRO record names and namespaces](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/data-formats/controlling-avro-record-names-and-namespaces.md): This page a tutorial to control AVRO record names and namespaces with Lenses SQL Processors.
- [Changing the shape of data](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/data-formats/changing-the-shape-of-data.md): This page describe a tutorial to change the shape (fields) of data in a Kafka topic using Lenses SQL Processors.
- [Filtering & Joins](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/filtering-and-joins.md)
- [Filtering data](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/filtering-and-joins/filtering-data.md): This page describes a tutorial to filter records in a Kafka topic with Lenses SQL Processors.
- [Enriching data streams](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/filtering-and-joins/enriching-data-streams.md): This page describes a tutorial to enrich a Kafka topic using Lenses SQL Processors.
- [Joining streams of data](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/filtering-and-joins/joining-streams-of-data.md): This page describes a tutorial joining Kafka topics with Lenses SQL Processors.
- [Using multiple topics](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/filtering-and-joins/using-multiple-topics.md): This page describes a tutorial to use multiple Kafka topics in a Lenses SQL Processor.
- [Aggregations](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/aggregations.md)
- [Aggregating data in a table](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/aggregations/aggregating-data-in-a-table.md): This page describes a tutorial to aggregate Kafka topic data into a table using Lenses SQL Processors.
- [Aggregating streams](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/aggregations/aggregating-streams.md): This page describes a tutorial to aggregate data Kafka topic data into a stream using Lenses SQL Processors
- [Time window aggregations](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/aggregations/time-window-aggregations.md): This page describes a tutorial to perform time windowed aggregations on Kafka topic data with Lenses SQL Processors.
- [Complex types](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/complex-types.md)
- [Unwrapping complex types](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/complex-types/unwrapping-complex-types.md): This page describes a tutorial to unwrap a complex data type in a Kafka topic using Lenses SQL Processors.
- [Working with Arrays](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/complex-types/working-with-arrays.md): This page describes a tutorial on how to work with array data in your Kafka topics using Lenses SQL Processors.
- [Controlling event time](https://docs.lenses.io/latest/user-guide/6.2-user-guide/using/tutorials/sql-processors/controlling-event-time.md): This describes how to control event time for data in your Kafka topics with Lenses SQL Processors.


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