When you create a table, Oracle allocates to the table’s data segment an initial extent
of a specified number of data blocks.
An incremental extent is a subsequent extent of the same or greater size than
the previously allocated extent in that segment.
For maintenance purposes, the header block of each segment contains a directory of
the extents in that segment.
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/10599713/viewspace-934856/ ，如需转载，请注明出处，否则将追究法律责任。
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