Differences between BYTES column in DBA_DATA_FILES, DBA_SEGMENTS and DBA_FREE_SPACE views

(Doc ID 1550980.1)

Last updated on DECEMBER 06, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.1 to 11.2.0.4 [Release 10.2 to 11.2]
Information in this document applies to any platform.
***Checked for relevance on 13-Sep-2016***

Goal

What's the difference between BYTES column in DBA_DATA_FILES, DBA_SEGMENTS and DBA_FREE_SPACE?

How to perform correct calucation/comparison between them?

Solution

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