In Example 4-2, more complexity is added to the creation of a range-partitioned table. Storage parameters and a
LOGGING attribute are specified at the table level. These replace the corresponding defaults inherited from the tablespace level for the table itself, and are inherited by the range partitions. However, because there was little business in the first quarter, the storage attributes for partition
sales_q1_2006 are made smaller. The
ENABLE ROW MOVEMENT clause is specified to allow the automatic migration of a row to a new partition if an update to a key value is made that would place the row in a different partition.
Example 4-2 Creating a range-partitioned table with LOGGING and ENABLE ROW MOVEMENT
CREATE TABLE sales ( prod_id NUMBER(6) , cust_id NUMBER , time_id DATE , channel_id CHAR(1) , promo_id NUMBER(6) , quantity_sold NUMBER(3) , amount_sold NUMBER(10,2) ) STORAGE (INITIAL 100K NEXT 50K) LOGGING PARTITION BY RANGE (time_id) ( PARTITION sales_q1_2006 VALUES LESS THAN (TO_DATE('01-APR-2006','dd-MON-yyyy')) TABLESPACE tsa STORAGE (INITIAL 20K NEXT 10K) , PARTITION sales_q2_2006 VALUES LESS THAN (TO_DATE('01-JUL-2006','dd-MON-yyyy')) TABLESPACE tsb , PARTITION sales_q3_2006 VALUES LESS THAN (TO_DATE('01-OCT-2006','dd-MON-yyyy')) TABLESPACE tsc , PARTITION sales_q4_2006 VALUES LESS THAN (TO_DATE('01-JAN-2007','dd-MON-yyyy')) TABLESPACE tsd ) ENABLE ROW MOVEMENT;