How to split actual:
in two.
alter table tableName
where:
Specify the new noninclusive (LESS THAN) upper bound for the first of the two new partitions.
Example:
alter table tableName split partition partitionName
at ( to_date( '02-01-2000', 'mm-dd-yyyy' ) )
into ( newPartitionNameBelow, newPartitionNameAbove );