In Oracle Application Express, no privileges are granted to database users when creating a workspace on an existing schema. Unless direct grants exist, database users in Oracle Application Express will not be able to create tables or other database objects. To allow the creation of typical database objects, Oracle recommends the following list of directly granted privileges:
grant CREATE SESSION to [database username]
grant CREATE CLUSTER to [database username]
grant CREATE DIMENSION to [database username]
grant CREATE INDEXTYPE to [database username]
grant CREATE JOB to [database username]
grant CREATE MATERIALIZED VIEW to [database username]
grant CREATE OPERATOR to [database username]
grant CREATE PROCEDURE to [database username]
grant CREATE SEQUENCE to [database username]
grant CREATE SNAPSHOT to [database username]
grant CREATE SYNONYM to [database username]
grant CREATE TABLE to [database username]
grant CREATE TRIGGER to [database username]
grant CREATE TYPE to [database username]
grant CREATE VIEW to [database username]