While designing the database for one of your online transaction processing (OLTP) applications, you want to achieve the following:
a) high availability of data
b) faster primary key access to the table data
c) compact storage for the table
Which type of tables would you use to achieve these objectives?
A.
heap tables
B.
object tables
C.
partitioned tables
D.
index-organized tables (IOTs)
Explanation:
Compared to heap tables, IOTs have:
* Faster key-based access to table data
* Do not duplicate the storage of primary key values
* Require less storage
* Use secondary indexes and logical rowids
* Have higher availability, as table reorganization does not invalidate secondary indexes
Ref.:
Oracle Database 10g: Administration Workshop II. Page: 13-30.