What is this Partition type mention in code "Partition by HASH".

Hi Team,
Regularly i am Adding new partions and sub-Partitions to production table, based on Date. For example Every Day Data stored in one partion.
please find below code, what i am using to add new partitions. I think this called RANGE partition.
CREATE TABLE "owner"."TABLE_NAME"
(     "COLUMN01" VARCHAR2(4),
     "ACOLUMN02" VARCHAR2(32) NOT NULL ENABLE,
BUFFER_POOL DEFAULT)
TABLESPACE "Tablespace_name"
PARTITION BY RANGE ("Daily_TIME")
(PARTITION "ABC_2008_08_31" VALUES LESS THAN (TO_DATE(' 2008-08-31 23:59:59', '
SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN'))
PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255
STORAGE(INITIAL 1048576 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
Now i have found new type of code from one of the new table created by development team.
Code is.....
CREATE TABLE "owner"."TABLE_NAME"
(     "COLUMN01" VARCHAR2(4),
     "ACOLUMN02" VARCHAR2(32) NOT NULL ENABLE,
BUFFER_POOL DEFAULT)
TABLESPACE "Tablespace_name"
PARTITION BY HASH ("ACCOUNT_NUMBER")
(PARTITION "PART_P01"
TABLESPACE "tABLESPACE01",
PARTITION "pART_P13"
TABLESPACE "Tabelspace01") ENABLE ROW MOVEMENT;
There is no below code in new Table code....
( (PARTITION "ABC_2008_08_31" VALUES LESS THAN (TO_DATE(' 2008-08-31 23:59:59', '
SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN'))
SO, i am unable to alter this table to add new partions monthly wise.
Please suggest me, How to save data date wise in this table. Also suggest me if it is not comes under RANGE Partion or not.
If not possible to add new partition data wise, I will inform to client.
Thanks & Regards,
Venkat

New table use hash partitioning, not range partitioning. You can refer to the Concepts:
http://docs.oracle.com/cd/E11882_01/server.112/e25789/schemaob.htm#CNCPT88864
The key of new partitioned table is account number, not date, therefore you cannot partition this table date-wise.

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