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 vote343 views1 answer
Postgresql linux password
SQL
0 vote314 views1 answer
Select max salary from each department in sql
SQL
1 vote326 views1 answer
How to between in sql
SQL
1 vote337 views2 answers
Group_concat limit mysql
SQL
9 votes313 views2 answers
Oracle all tables in schema
SQL
0 vote326 views1 answer
Delete a record from a table sqlite3
SQL
0 vote327 views1 answer
Sql count total by foreign key
SQL
0 vote314 views1 answer
The local psql command could not be located
SQL
1 vote344 views7 answers
Filter
SQL
-1 vote343 views1 answer
Failed to process SQL command - ORA-28014: cannot drop administrative user or role
SQL