# Flink SQL Functions in Confluent Cloud for Apache Flink Confluent Cloud for Apache Flink® enables you to do data transformations and other operations with the following built-in functions. - [Aggregate Functions](aggregate-functions.md#flink-sql-aggregate-functions) - [Changelog Conversion Functions](changelog-conversion.md#flink-sql-changelog-conversion-functions) - [Collection Functions](collection-functions.md#flink-sql-collection-functions) - [Comparison Functions](comparison-functions.md#flink-sql-comparison-functions) - [Conditional Functions](conditional-functions.md#flink-sql-conditional-functions) - [Datetime Functions](datetime-functions.md#flink-sql-datetime-functions) - [Hash Functions](hash-functions.md#flink-sql-hash-functions) - [JSON Functions](json-functions.md#flink-sql-json-functions) - [ML Preprocessing Functions](ml-preprocessing-functions.md#flink-sql-ml-preprocessing-functions) - [Model Inference Functions](model-inference-functions.md#flink-sql-model-inference-functions) - [Numeric Functions](numeric-functions.md#flink-sql-numeric-functions) - [Search Functions](search-functions.md#flink-sql-search-functions) - [String Functions](string-functions.md#flink-sql-string-functions) - [Table API Functions](table-api-functions.md#flink-table-api-functions) ## Related content - [User-defined Functions](../../concepts/user-defined-functions.md#flink-sql-udfs) - [Create a User Defined Function](../../how-to-guides/create-udf.md#flink-sql-create-udf) - [Flink SQL Queries](../queries/overview.md#flink-sql-queries) - [DDL Statements](../../concepts/statements.md#flink-sql-statements)