Category: ORACLE 12CR2

This is one of the new feature of oracle 12.2 release . Non-partitioned tables can be converted to partitioned table online without any downtime to the application , i.e no impact to the DML activities. Till now for this activity, we were using dbms_redef methods. But in Oracle 12.2 release this has been simplified much. […]

A lot of enhancements has been done in Oracle 12.2 Release.  In this article We will explain the new features of datapump utility in oracle 12.2 Release. 1.Parfile content  written to logfile: Till now, log file of expdp or impdp, doesn’t store the content of parfile, The log file used to look as below. Export: Release […]

In Oracle 12.2 Release We can use the INACTIVE_ACCOUNT_TIME resource parameter in profile to automatically lock the account of a database user who has not logged in to the database instance in a specified number of days. 1. By default, it is set to UNLIMITED. 2. The minimum setting is 15 and the maximum is […]

In previous Releases, To move a table to a different tablespace or segment, we need to take downtime for this activity And after moving the table, we have to rebuild/recreate the indexes. Now with Oracle 12.2, We can move the table online to a different segment or tablespace, without impacting the DML activities and without […]

DBMS_TNS package provides the RESOLVE_TNSNAME function to resolve a TNS name and return the corresponding Oracle Net8 connection string.When you connect locally to the server (no SQL*Net, no listener), the Oracle session inherits the client environment.   It is available on oracle 12.2 Release . The DBMS_TNS package contains one function, RESOLVE_TNSNAME, which returns the […]

Till now we can make a table read only, But what about setting few partitions of a table to read-only. Thanks to Oracle 12.2 Release, We can do this. This is usually helpful, If requirement is to make the historical data not editable. SQL> col PARTITION_NAME for a32 SQL> select partition_name,read_only from dba_tab_partitions where table_name=’ORDER_TAB’; […]

In Oracle 12.2, We can split partitions or subpartitions online without impacting the DML statements. SQL> select partition_name,read_only,high_value from dba_tab_partitions where table_name=’ORDER_TAB’; PARTITION_NAME READ HIGH_VALUE ——————————– —- ——————————————————————————– CREATED_2105_P10 NO TO_DATE(‘ 2015-11-01 00:00:00’, ‘SYYYY-MM-DD HH24:MI:SS’, ‘NLS_CALENDAR=GREGORIA CREATED_2105_P11 NO TO_DATE(‘ 2015-12-01 00:00:00’, ‘SYYYY-MM-DD HH24:MI:SS’, ‘NLS_CALENDAR=GREGORIA CREATED_2105_P12 NO TO_DATE(‘ 2016-01-01 00:00:00’, ‘SYYYY-MM-DD HH24:MI:SS’, ‘NLS_CALENDAR=GREGORIA CREATED_2105_P8 NO TO_DATE(‘ […]

There are two undo modes in oracle 12.2 Multitenant database 1. Local undo mode 2. Shared undo mode Local undo mode: In this mode, each container ( i.e PDB ) in multitenant will have their own active undo tablespace. Share Undo mode: In this mode, There will be only one undo tablespace for the instance. […]