How To Get A List Of Oracle Database Schemas?

Well, this is one of those circumstances, where your ability to answer this question will depend upon your user’s assigned security roles and what you actually want. 

To get a complete list, you will need to use the DBA_ administrator tables to which most of us will not have access.  In the very simple examples below, you may want to add a WHERE clause to eliminate the system schemas from the list, like ‘SYS’ and ‘SYSTEM,’ if you have access to them.

Example Administrator (DBA) Schema List

SELECT distinct OWNER as SCHEMA_NAME

FROM  DBA_OBJECTS

ORDER BY OWNER;

Example Administrator (DBA) Schema List Results Screenshot

Fortunately for the rest of us, there are All user tables, from which we can get a listing of the schemas to which we have access.

Example All Users Schema List

SELECT distinct OWNER as SCHEMA_NAME

FROM    ALL_OBJECTS

ORDER BY OWNER;

Example All Users Schema List Results Screenshot

Related References

Oracle help Center > Database> Oracle > Oracle Database > Release 19