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

0 vote219 views1 answer
Order by number of character in sql
SQL
0 vote225 views2 answers
Mysql on update current_timestamp
SQL
1 vote195 views2 answers
Procedure pl/sql
SQL
0 vote223 views1 answer
Find number of entries sql
SQL
1 vote224 views1 answer
Select if then postgresql
SQL
0 vote251 views1 answer
Sql today at midnight
SQL
0 vote232 views1 answer
Ubuntu connect to mssql database
SQL
5 votes212 views1 answer
Mysql get last day of month
SQL
0 vote190 views1 answer
FindAllBy
SQL
0 vote222 views1 answer
Sql database connectivity
SQL