- You can find out using the following dictionray views
DBA_TABLES.temporary, DBA_SEGMENTS.segment_type,V$TEMPFILE, DBA_TEMP_FILES

- select * from dba_segments where segment_type = ‘TEMPORARY’;

- What is temporary segments or temporary tables

– other sessions can see table definition but not data
– data truncated when transaction/session (commit/rollback/exit) ends
– sessions get bound to temporary tables with the first insert into the table
– segments allocated to table at insert time not create time like normal tables

– creating
– session specific:
CREATE GLOBAL TEMPORARY TABLE ON COMMIT PRESERVE ROWS;
– transaction specific:
CREATE GLOBAL TEMPORARY TABLE ON COMMIT DELETE ROWS;

– example:
CREATE GLOBAL TEMPORARY TABLE emp_temp
(emp_name VARCHAR(60) NOT NULL,
emp_id NUMBER(4) NOT NULL,
CONSTRAINT emp_temp_pk PRIMARY KEY (emp_id)) ON COMMIT PRESERVE ROWS;

INSERT INTO emp_temp (emp_name, emp_id) values(‘Mudhalvan’,1);

COMMIT;