Hi @Patankar, Narottam ,
Welcome to Microsoft Q&A forum and thanks for using Azure services.
As I understand, you want to perform Oracle Database migration to Azure Cloud.
Please let us know if I have missed anything in understanding.
Your migration path can be to an Azure Virtual Machine (VM). It might also be to an Azure Managed Database that is running on an Azure VM.
Below are the detailed standard documentation links describing the process:
Oracle database migration decision process
Oracle database migration to Azure refer this for different options available.
Oracle VM images and their deployment on Microsoft Azure
Create an Oracle Database in an Azure VM
Alternatively, If your database is over 2 TB, you can use Oracle Data Guard with Oracle Recovery Manager (RMAN), or use Data Pump to replicate changes after an initial bulk data transfer, which provides a minimal downtime migration.
Hope this helps. Let us know if further queries. Thank you.