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

20 votes230 views5 answers
Reset auto increment mysql
SQL
0 vote233 views1 answer
How get data from database if id not found then search another column
SQL
0 vote243 views1 answer
Error Code: 1140. In aggregated query without GROUP BY, expression #3 of SELECT list contains nonaggregated column 'grepper_history.search_history.term'; this is incompatible with sql_mode=only_full_group_by
SQL
0 vote247 views2 answers
How to Alter column in SQL Server - NAYCode.com
SQL
1 vote237 views1 answer
Job for mariadb.service failed because the control process exited with error code. see "systemctl status mariadb.service" and "journalctl -xe" for details.
SQL
0 vote219 views2 answers
Sql query unique
SQL
5 votes243 views2 answers
Mysql import gzip db
SQL
0 vote223 views1 answer
Show function mysql
SQL
12 votes221 views3 answers
Duplicate a column in sql
SQL
2 votes231 views1 answer
Sql server find table name
SQL