OCA: Oracle 10g™ Administration I: Study Guide

3.2. Managing Tablespaces

Tablespaces physically group schema objects for administration convenience. They bridge physical structures, such as datafiles or extents, and logical structures, such as tables and indexes. Tablespaces can store zero or more segments. Segments are schema objects that require storage outside the data dictionary. Tables and indexes are examples of segments. Constraints and sequences are examples of schema objects that do not store data outside the data dictionary and are therefore not segments.

Figure 3.1. Segment, extents, and data blocks

You can place the tables and indexes associated with an application into a set ...