Added ADB Chat app

apex/README.md

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+# Sample APEX Apps
+Listed below are sample applications that leverage Autonomous Database.
+
+Autonomous Database is already configured with APEX. After creating your APEX workspace, simply import the applications using the APEX App Builder.
+
+## ADB Chat
+ADB Chat allows you to query data in Autonomous Database using natural language. It uses the AI profiles that are in the current user's schema. Those profiles support both natural language to SQL as well as RAG.
+
+[![ADB Chat app](https://img.youtube.com/vi/2C-wirdC0aw/0.jpg)](https://www.youtube.com/watch?v=2C-wirdC0aw)
+
+
+Simply import the application into your APEX development environment.
+
+* [Download the APEX application](select-ai-chat/f101.sql)
+
+Background material:
+* [APEX in Autonomous Database documentation](https://docs.oracle.com/en/cloud/paas/autonomous-database/serverless/adbsb/application-express-autonomous-database.html)
+* [Create an AI profile](../sql/select-ai-create-profile.sql)
+* [NL2SQL](../sql/select-ai-nl2sql.sql)
+* [Select AI RAG](../sql/select-ai-rag.sql)
+
+
+
+<hr>
+Copyright (c) 2025 Oracle and/or its affiliates.<br>
+Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl/