# Developer Guide for ksqlDB for Confluent Platform ksqlDB provides a SQL-like programming language for creating streaming apps, plus a REST API and a Java client for issuing requests to that API in code. - [ksqlDB REST API](ksqldb-rest-api/overview.md#ksqldb-rest-api) - [SQL Reference](ksqldb-reference/overview.md#ksqldb-api-index) - [ksqlDB Joins](joins/overview.md#ksqldb-joins) - [Java Client](java-client/java-client.md#ksqldb-developer-guide-java-client) ## Related content - Developer course: [ksqlDB 101](https://developer.confluent.io/learn-kafka/ksqldb/intro/) - Developer course: [Inside ksqlDB](https://developer.confluent.io/learn-kafka/inside-ksqldb/)