Purge undo tablespace usage

-- UNDO tablespace current usage / available space
SELECT a.TABLESPACE_NAME, SIZEMB, USAGEMB, (SIZEMB - USAGEMB) AS FREEMB
FROM (SELECT round(sum(BYTES) / 1e6) AS SIZEMB, b.TABLESPACE_NAME
      FROM DBA_DATA_FILES a, DBA_TABLESPACES b
      WHERE a.TABLESPACE_NAME = b.TABLESPACE_NAME AND b.CONTENTS LIKE 'UNDO'
      GROUP BY b.TABLESPACE_NAME) a,
     (SELECT c.TABLESPACE_NAME, sum(BYTES) / 1e6 AS USAGEMB
      FROM DBA_UNDO_EXTENTS c
      WHERE STATUS <> 'EXPIRED'
      GROUP BY c.TABLESPACE_NAME) b
WHERE a.TABLESPACE_NAME = b.TABLESPACE_NAME;

Source: smarttechways.com

Similar codes

1 vote346 views1 answer
Sql how to duplicate a table
SQL
2 votes372 views5 answers
Install postgresql 10 centos 7
SQL
0 vote362 views1 answer
Provide hardcoded value in the mysql query
SQL
-3 votes371 views2 answers
How to enable mysql authentication on ubuntu 18.04
SQL
13 votes345 views6 answers
Restart postgresql
SQL
0 vote345 views1 answer
Ms sql database data size
SQL
0 vote374 views2 answers
Generate sql trigger through ef migration
SQL
0 vote416 views1 answer
Selecting specific day in colum sql
SQL
0 vote336 views1 answer
Compare if is null sql
SQL
0 vote354 views1 answer
Create bdd mysql
SQL