A segment is a set of extents that contains all the data for a specific logical storage

structure within a tablespace. For example, for each table, Oracle allocates one or more

extents to form that table’s data segment, and for each index, Oracle allocates one or

more extents to form its index segment.

1. segment是一组extents

2. 包含某指定的逻辑存储结构的所有数据

3. 分配数据段form数据,分配索引段form索引

form

n.

形状, 形态, 外形, 表格, 形式

v.

形成, 构成, 排列, (使)组成

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Overview of Segments (22)