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 vote88 views1 answer
How to run sql script
SQL
0 vote138 views1 answer
Select lowest values sql
SQL
5 votes126 views3 answers
How to remove unique key constraint in mysql
SQL
1 vote136 views1 answer
Sql count value greater than
SQL
2 votes129 views1 answer
Sql server conection string
SQL
6 votes127 views4 answers
How to remove unique key in mysql
SQL
0 vote170 views1 answer
Ms sql print more than 1 variable
SQL
0 vote129 views1 answer
Select from 3 tables one is empty
SQL
1 vote118 views1 answer
Stop mysql server mac
SQL
0 vote125 views1 answer
Sql server list user permissions
SQL