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 vote143 views1 answer
Create table in dbms cmds
SQL
2 votes149 views1 answer
Sql server check for value in multiple columns
SQL
0 vote125 views1 answer
Difference between cross apply and inner join
SQL
2 votes136 views1 answer
Anonymous block plsql
SQL
0 vote144 views1 answer
Mysql max connections exceeded max_connections_per_hour
SQL
4 votes188 views2 answers
Mysql alter table set column unique
SQL
0 vote143 views1 answer
Postgresql using reserved word as column name
SQL
2 votes151 views1 answer
Create delete procedure mysql
SQL
0 vote140 views1 answer
Postgres 11 add primary key
SQL
5 votes146 views2 answers
Create function postgresql
SQL