Oracle Top Tables Segment Size and Schema Size Scripts

Hi,

You want to learn which table is biggest in database or which schema is biggest in database.

 

You can learn Top Schema of database and Schema size with following script.

SELECT * FROM (
SELECT OWNER, SUM(BYTES)/1048576 MB 
from DBA_SEGMENTS 
GROUP BY OWNER 
ORDER BY MB DESC)
WHERE ROWNUM < 20;

 

You can learn Top segment of database and Table size with following script.

SELECT * FROM (
SELECT SEGMENT_NAME,SEGMENT_TYPE, round(SUM(BYTES)/power(2,20)) SEGMENT_SIZE
FROM DBA_SEGMENTS
GROUP BY SEGMENT_NAME, SEGMENT_TYPE
ORDER BY 3 desc)
WHERE ROWNUM < 31;

 

Mehmet Salih Deveci

I am Founder of IT Tutorial and Certified Expert about Oracle & SQL Server database, Goldengate, Exadata Machine, Oracle Database Appliance administrator with 10+years experience. I have OCA, OCP, OCE RAC Expert Certificates I have worked 100+ Banking, Insurance, Finance, Telco and etc. clients as a Consultant, Insource or Outsource. I have done 200+ Operations in this clients such as Exadata Installation & PoC & Migration & Upgrade, Oracle & SQL Server Database Upgrade, Oracle RAC Installation, SQL Server AlwaysOn Installation, Database Migration, Disaster Recovery, Backup Restore, Performance Tuning, Periodic Healthchecks. I have done 2000+ Table replication with Goldengate or SQL Server Replication tool for DWH Databases in many clients. If you need Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS Consultancy and Training you can send my email adress mehmetsalih.deveci@outlook.com. -                                                                                                                                                                                                                                                 - Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS ve linux Danışmanlık ve Eğitim için  mehmetsalih.deveci@outlook.com a mail atabilirsiniz.