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 vote316 views1 answer
Delete mysql ubuntu 20.04
SQL
0 vote288 views1 answer
Sql last 3 rows
SQL
0 vote286 views2 answers
How covert into int in maria db
SQL
1 vote268 views2 answers
Replace text in sql
SQL
4 votes278 views3 answers
Drop Table Oracle
SQL
-1 vote294 views1 answer
Phinehas Psalm 106
SQL
1 vote300 views1 answer
Print all records of table in mysql
SQL
15 votes261 views2 answers
How to drop database name in postgresql
SQL
4 votes277 views1 answer
Add constraint fk
SQL
3 votes234 views1 answer
How to get list of synonyms in oracle
SQL