Oracle/PLSQL: ORA-00955 Error

Error:

ORA-00955: name is already used by an existing object

Cause:

You tried to create a table, view, index, synonym or other object with a name that is already in use.

Action:

The options to resolve this Oracle error are:

Rename your object that you are trying to create so that it is unique.
Drop the existing object and create the new object.

For a listing of objects with a particular name, you can run the following query:

SELECT *
FROM all_objects
WHERE object_name = 'NAME';

For example, if you wanted to find the objects whose name is SUPPLIERS, you could run the following SQL:

SELECT *
FROM all_objects
WHERE object_name = 'SUPPLIERS';

Please note that object_name's are stored in the all_objects table in uppercase.