drop table  interval_partition;
create table
interval_partition(
   start_date        DATE,
   store_id          NUMBER,
   inventory_id      NUMBER(6),
   qty_sold          NUMBER(3)
)
PARTITION BY RANGE (start_date)
INTERVAL (NUMTODSINTERVAL(1, 'DAY'))
( 
   PARTITION pos_data_p2 VALUES LESS THAN (TO_DATE('1-7-2007', 'DD-MM-YYYY')),
   PARTITION pos_data_p3 VALUES LESS THAN (TO_DATE('1-8-2007', 'DD-MM-YYYY'))
); 

drop table interval_partition;
create table
interval_partition(
   start_date        DATE,
   store_id          NUMBER,
   inventory_id      NUMBER(6),
   qty_sold          NUMBER(3)
)
PARTITION BY RANGE (start_date)
INTERVAL (NUMTODSINTERVAL(1, 'DAY'))
( 
   PARTITION pos_data_p2 VALUES LESS THAN (TO_DATE('1-7-2007', 'DD-MM-YYYY')),
   PARTITION pos_data_p3 VALUES LESS THAN (sysdate))
); 

ORA-14019: partition bound element must be one of: string, datetime or interval literal, number, or MAXVALUE
14019. 00000 -  "partition bound element must be one of: string, datetime or interval literal, number, or MAXVALUE"
*Cause:    Partition bound list contained an element of invalid type
           (i.e. not a number, non-empty string, datetime or interval literal,
           or MAXVALUE)
*Action:   Ensure that all elements of partition bound list are of valid type