How do I alter my existing table to create a range partition in Oracle

Question

I have existing table which has 10 years of data (I have taken dump).

I would like to Range partition the existing table on one date key column within the table.

Answer 1

If you are using Oracle 12c Release 2 you could use single ALTER to convert non-partitioned table to partitioned one (this is one way trip):

CREATE TABLE my_tab ( a NUMBER(38,0), b NUMBER(38,0)); 

ALTER TABLE MY_TAB MODIFY PARTITION BY RANGE (a) INTERVAL (1000) (   
    PARTITION p1 VALUES LESS THAN (1000)) ONLINE;

You could convert indexes too, adding:

update indexes (index_name [local/global]);

db<>fiddle demo