Explanation/Reference:
Explanation:
To maximize storage savings with Hybrid Columnar Compression, data must be loaded using data warehouse bulk loading techniques. Examples of bulk load operations commonly used in data warehouse environments are:
* Insert statements with the APPEND hint
* Parallel DML
* Direct Path SQL*LDR
* Create Table as Select (CTAS)
Incorrect:
Not A, Not C: DML operations (INSERT/UPDATE) against a Hybrid Columnar Compressed table/partition can reduce the overall compression savings over time since data INSERTED/UPDATED via DML operations will not be compressed to the same ratio as data that is bulk loaded.