Leave here an example of how to create a partitioned table from a non partitioned table ( in this case with organization head). Remember that CTAS copy the NULL or NOT NULL constraint, but not as DEFAULT VALUES conditions.
CREATE TABLE SIEBEL.USERS_PARTITIONATED
PARTITION BY RANGE (F_ALTA)
(
PARTITION P1 VALUES LESS THAN (TO_DATE('01-01-2013','DD-MM-YYYY')),
PARTITION P2 VALUES LESS THAN (TO_DATE('01-01-2014','DD-MM-YYYY')),
PARTITION P3 VALUES LESS THAN (TO_DATE('01-01-2015','DD-MM-YYYY'))
)
TABLESPACE WORK
AS SELECT *
FROM SIEBEL.USERS
/
HTH – Antonio NAVARRO
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