Oracle Express Edition is easy to install and manage and is free to develop, deploy and distribute. Also from this version migration to Other edition of oracle database is not costly and complex.
Oracle Database express edition can be installed on any machine with any number of CPUs. It stores up to 11 GB of user data using up to 1 GB of memory and using only one CPU on the host machine.
Steps to Install Oracle 21C Express Edition
Step 1: Go to Oracle Download
Step 2: From Developer Downloads section select Database
Step 3: Select Database Express Edition from Database section
Step 4: Select the latest version for Windows from the Oracle Database 21c Expression Edition list
Step 5: Download will start once you click on the link, extract the file once download finished. At the bottom you will find setup.exe Open that file
Step 6: On Welcome screen click next
Step 7: Accept License and click Next
Step 8: Change the folder if you want otherwise click on Next
Step 9: Enter Password, this is very important password to remember for later use
Step 10: On Summary page click on Install.
Step 11: Prepare a tea, till the time installation reach to finish.