Dynamic table partitioning in Oracle

Question

I\'m in the process of building a database storage for my app consisting on a single table with a huge data volume (hundreds of millions of records). I\'m planning on having an

Answer 1

Here is a sample of something I came up with for creating partitions using SYSDATE and an offset. I had to create replacement parameters with a string concatenated to the SYSDATE:

COLUMN temp_var new_value partition_name_01;
SELECT 'TABLE_NAME_' || TO_CHAR(SYSDATE - 3, 'YYYYMMDD') AS temp_var FROM dual;
COLUMN temp_var new_value partition_date_01;
SELECT TO_CHAR(SYSDATE - 3, 'SYYYY-MM-DD') || ' 00:00:00' AS temp_var FROM dual;
COLUMN temp_var new_value partition_name_02;
SELECT 'TABLE_NAME_' || TO_CHAR(SYSDATE - 2, 'YYYYMMDD') AS temp_var FROM dual;
COLUMN temp_var new_value partition_date_02;
SELECT TO_CHAR(SYSDATE - 2, 'SYYYY-MM-DD') || ' 00:00:00' AS temp_var FROM dual;
COLUMN temp_var new_value partition_name_03;
SELECT 'TABLE_NAME_' || TO_CHAR(SYSDATE - 1, 'YYYYMMDD') AS temp_var FROM dual;
COLUMN temp_var new_value partition_date_03;
SELECT TO_CHAR(SYSDATE - 1, 'SYYYY-MM-DD') || ' 00:00:00' AS temp_var FROM dual;
COLUMN temp_var new_value partition_name_04;
SELECT 'TABLE_NAME_' || TO_CHAR(SYSDATE, 'YYYYMMDD') AS temp_var FROM dual;
COLUMN temp_var new_value partition_date_04;
SELECT TO_CHAR(SYSDATE, 'SYYYY-MM-DD') || ' 00:00:00' AS temp_var FROM dual;
CREATE TABLE TABLE_NAME
(
   SEQ_NO                 NUMBER NOT NULL,
   INSERT_DATE            DATE NOT NULL,
   FIRST_NAME             VARCHAR2 (256 BYTE),
   LAST_NAME              VARCHAR2 (256 BYTE),
   ID_NUM                 NUMBER,
   ID_STATUS              NUMBER
)

PARTITION BY RANGE
   (INSERT_DATE)
   SUBPARTITION BY LIST
      (ID_STATUS)
      SUBPARTITION TEMPLATE (
         SUBPARTITION SP1 VALUES (0) TABLESPACE &tblspce,
         SUBPARTITION SP2 VALUES (1) TABLESPACE &tblspce,
         SUBPARTITION SP3 VALUES (2) TABLESPACE &tblspce)

   (
   PARTITION &partition_name_01
      VALUES LESS THAN
      (TO_DATE ('&partition_date_01',
                   'SYYYY-MM-DD HH24:MI:SS',
                   'NLS_CALENDAR=GREGORIAN')),

   PARTITION &partition_name_02
      VALUES LESS THAN
      (TO_DATE ('&partition_date_02',
                   'SYYYY-MM-DD HH24:MI:SS',
                   'NLS_CALENDAR=GREGORIAN')),

   PARTITION &partition_name_03
      VALUES LESS THAN
      (TO_DATE ('&partition_date_03',
                   'SYYYY-MM-DD HH24:MI:SS',
                   'NLS_CALENDAR=GREGORIAN')),
sysdate

   PARTITION &partition_name_04
      VALUES LESS THAN
      (TO_DATE ('&partition_date_04',
                   'SYYYY-MM-DD HH24:MI:SS',
                   'NLS_CALENDAR=GREGORIAN')))

ENABLE ROW MOVEMENT;