Oracle Tablespace Compression

The comment by @r0tt below about the dbms_redefinition package can be a big help; expecially for Oracle 12.2 or later, because it has a simplified procedure redef_table that automates the whole task; it is useful for applying compression to tables and indexes if you have the compression option licensed. Another plus: no downtime.

https://dba.stackexchange.com/questions/192625/oracle-shrinking-reclaiming-free-tablespace-space

If you want to know the tablespace name used by a particular table, use the user_tables dictionary view. The following is an example SQL query: Select. tablespace _name. From. user_tables. Where. table_name = 'EMP'; Check this post find tablespace in SQL developer to learn how to find tablespace using SQL developer in Oracle .

https://orclqa.com/how-to-find-tablespace-used-by-a-user-in-oracle/

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https://ittutorial.org/ora-64307-exadata-hybrid-columnar-compression-is-not-supported-for-tablespaces-on-this-storage-type/

Description: Exadata Hybrid Columnar Compression is not supported for tablespaces on this storage type Cause: An attempt was made to use Exadata Hybrid Columnar Compression on unsupported storage. Action: Create this table in a tablespace residing on Oracle Exadata, Oracle 's Sun ZFS or Pillar Axiom storage or use a different compression type.

https://www.oraexcel.com/database-oracle-11gR2-ORA-64307

Advanced Row Compression , and Hybrid Columnar Compression , work well with tablespace -level encryption. Tables are compressed before encryption, so the compression ratio is not affected by the encryption. With column-level encryption, the encryption is done before compression , which will negatively impact the compression ratio

https://blogs.oracle.com/dbstorage/post/interested-in-oracle-database-compression-best-practices-and-insights

ODA: Create a Tablespace With Default Table Compression Results ORA-64307 (Doc ID 2668643.1) Last updated on AUGUST 26, 2020. Applies to: Oracle Database - Enterprise Edition - Version 18.7.0.0.0 and later Information in this document applies to any platform. Symptoms

https://support.oracle.com/knowledge/Oracle%20Database%20Products/2668643_1.html

Use Oracle ’s basic compression feature to compress direct path–loaded data into a heap-organized table. Basic compression is enabled as follows: 1. Use the COMPRESS clause to enable compression either when creating, altering, SELECT TABLESPACE _NAME, DEF_TAB_ COMPRESSION , COMPRESS_FOR FROM DBA_ TABLESPACES WHERE ...

https://farhatdba.wordpress.com/2013/11/13/compression-for-tablespaces-and-tables/