C H A P T E R  4


Tablespaces and Datafiles

As you saw in Chapter 2, when you create a database, typically five tablespaces are created when you execute the CREATE DATABASE statement:

  • UNDO
  • TEMP

A tablespace is a logical container that allows you to manage groups of datafiles. A tablespace has one more datafiles associated with it. A datafile can be associated with only one tablespace. In other words, a datafile can't be shared between two tablespaces. A datafile is the physical file that is created on disk. The datafile stores data for database objects such as tables and indexes. Figure 4–1 shows the logical constructs used ...

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