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25

answers:

1
+1  Q: 

Is an extent used to add new data?

Is an extent used to add new data?what is segment and how is it releted to an extent?

A: 

In a nutshell, each non-partioned table, index, table partition etc. has 1 segment to hold its data. Each segment consists of one or more extents. For a more detailed explanation I'll refer you to the Oracle 9i Concepts Guide: Logical Database Structures.

Tony Andrews  2010-09-06 10:13:28

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