How to check the size of a tablespace in Oracle?

To check the size of table spaces in an Oracle database, you can follow these steps:

1. Login to the Oracle database using a system administrator or a user with DBA privileges.
2. To view all table spaces in the current database, run the following command:
3. Retrieve the tablespace name and the total size in megabytes from the database’s free space group by tablespace name.
4. This will display the name and size (in megabytes) of each tablespace.
5. To view the size of each data file in the tablespace, you can execute the following command:
6. Retrieve the tablespace name, file name, and size in megabytes for each data file from the dba_data_files table.
7. This will display the tablespace, file name, and size for each data file.

These commands can only be executed by users with DBA privileges. If you do not have sufficient permissions, please contact the system administrator to request access.