Articles Tagged: multitenant

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. […]