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how to check tablespace total space, free space and used space.

in PL/SQL (MOSC) 1 commentAnswered

Hi Team,


I am using Oracle 12 c version.

Question: How to find tablespace total space, free space and used space.

I have checked some queries on internet and find 2 conditions

Condition 1: find Used space from dba_segments and after that calculate free space

by using total space -used space.

Condition 2: find free space from dba_free_space and after that calculate used space by using total space - free space

Both the conditions taking total space from dba_data_files and both the conditions giving different results. Can anybody guide me which condition we should use to calcualate tablespace used space and free space.

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