Exclude values from oracle partition

问题

I want to use a Composite Range-List Partitioning in oracle.

Using a range is pretty clear to me. The tricky part is on the list partition and this is where i have the question.

Let's assume we have a column with continents. I want the list partition that to include all the continents that are NOT Europe. The problem here is that i cannot create a list partition including all other continents except of Europe, as at some point i might add new continents.

Is something like this possible?

回答1:

From Oracle documentation

With list partitioning, there is no apparent sense of order between partitions. You can also specify a default partition into which rows that do not map to any other partition are mapped.

Based on above, you can create two partitions, one for Europe and another for others and set latter as default too. This way you can have your data of Europe in one partition and anything other than europe goes to default partition.

Here is an example

CREATE TABLE sample_regional_sales
      (deptno number, item_no varchar2(20),
       txn_date date, txn_amount number, state varchar2(2))
  PARTITION BY RANGE (txn_date)
    SUBPARTITION BY LIST (state)
      (PARTITION q1_1999 VALUES LESS THAN (TO_DATE('1-APR-1999','DD-MON-YYYY'))
          TABLESPACE tbs_1
         (SUBPARTITION q1_1999_northwest VALUES ('OR', 'WA'),
          SUBPARTITION q1_1999_southwest VALUES ('AZ', 'UT', 'NM'),
          SUBPARTITION q1_1999_northeast VALUES ('NY', 'VM', 'NJ'),
          SUBPARTITION q1_1999_southeast VALUES ('FL', 'GA'),
          SUBPARTITION q1_others VALUES (DEFAULT) TABLESPACE tbs_4
         ),
       PARTITION q2_1999 VALUES LESS THAN ( TO_DATE('1-JUL-1999','DD-MON-YYYY'))
          TABLESPACE tbs_2
         (SUBPARTITION q2_1999_northwest VALUES ('OR', 'WA'),
          SUBPARTITION q2_1999_southwest VALUES ('AZ', 'UT', 'NM'),
          SUBPARTITION q2_1999_northeast VALUES ('NY', 'VM', 'NJ'),
          SUBPARTITION q2_1999_southeast VALUES ('FL', 'GA'),
          SUBPARTITION q2_1999_northcentral VALUES ('SD', 'WI'),
          SUBPARTITION q2_1999_southcentral VALUES ('OK', 'TX')
         ),
       PARTITION q3_1999 VALUES LESS THAN (TO_DATE('1-OCT-1999','DD-MON-YYYY'))
          TABLESPACE tbs_3
         (SUBPARTITION q3_1999_northwest VALUES ('OR', 'WA'),
          SUBPARTITION q3_1999_southwest VALUES ('AZ', 'UT', 'NM'),
          SUBPARTITION q3_others VALUES (DEFAULT) TABLESPACE tbs_4
         ),
       PARTITION q4_1999 VALUES LESS THAN ( TO_DATE('1-JAN-2000','DD-MON-YYYY'))
          TABLESPACE tbs_4
      );

source

来源：https://stackoverflow.com/questions/41691961/exclude-values-from-oracle-partition

标签

sql

oracle11g

database-partitioning