What are the new features in Oracle 12c?

Posted on by Dominique Stacey

What are the new features in Oracle 12c?

Oracle Database 12c New Features – Part I

  • Online migration of an active data file.
  • Online table partition or sub-partition migration.
  • Invisible column.
  • Multiple indexes on the same column.
  • DDL logging.
  • Temporary undo in- and- outs.
  • New backup user privilege.
  • How to execute SQL statement in RMAN.

What is difference between Oracle 12c and 19c?

18c and 19c are both 12.2 releases of the Oracle database. Oracle Database 18c is Oracle 12c Release 2 (12.2. Oracle Database 19c is the long-term support release, with premier support planned through March 2023 and extended support through March 2026. Oracle 19c is essentially Oracle 12c Release 2 (12.2.

What are all the new features of Oracle external table in 12c r1 version?

External Table Enhancements in Oracle Database 12c Release 1 (12.1)

  • Setup.
  • Direct NFS (DNFS) Support.
  • Extended Data Type Support.
  • ORACLE_DATAPUMP Access Driver Enhancements.
  • ORACLE_LOADER Access Driver Enhancements.

What does indexes do in Oracle?

Indexes are used in Oracle to provide quick access to rows in a table. Indexes provide faster access to data for operations that return a small portion of a table’s rows. Although Oracle allows an unlimited number of indexes on a table, the indexes only help if they are used to speed up queries.

Which is better Oracle 11g or 12c?

Oracle 12c is just upgraded version of the Oracle 11g with some new features like cloud support and pluggable database, kind of like master slave architecture. With the Oracle 12 c, you can plug your database to cloud anytime. It has multiple new features like JSON support, multitenant architecture and etc.

What does the C stand for in 12c?

The latest version of the Oracle Database, introduced in 2013 (“c” stands for “cloud”). Oracle 12c added numerous enhancements for queries, migration, replication and recovery.

Is Oracle 12c end of life?

Oracle Database 12c EOL is following: 12.1 ： 2022/7/31. 12.2 ： 2026/3/31….Support period / end of support for Oracle DB 19c.

Product 12.1.0.2
Premier 2018/7/31
Extended 2022/7/31
Pathching Ends 2022/7/31

How can I upgrade from 12c to 19c?

Below is the high level steps:

  1. Installing Oracle 19.3. 0.0 binaries.
  2. Executing the preupgrade jar tool.
  3. Performing the preupgrade actions.
  4. Backing up the database / Create a guaranteed restore point.
  5. Upgrade the database.
  6. Perform the postupgrade actions.

What is the latest version of Oracle 12c?

Oracle Database 19c
Oracle Database 19c was released back in January 2019 on Oracle Live SQL and is the final release of the Oracle Database 12c product family.

What is the difference between 11g and 12c in Oracle?

Pluggable Database The main difference between Oracle 11g and 12c is that the Oracle 11g has no pluggable databases while Oracle 12c has pluggable databases. Moreover, Oracle 12c allows running multiple databases on the same hardware while maintaining the security and isolation among the databases.

Which is faster sorting or indexing?

Sorting might be a better choice for investigative work because it outputs a new table that can serve as the basis for subsequent analysis….Benefits and drawbacks of sorting and indexing.

Sorting Indexing
Searching character fields Slower Faster

What are the types of indexes?

Unique indexes enforce the constraint of uniqueness in your index keys….Expression-based indexes efficiently evaluate queries with the indexed expression.

  • Unique and non-unique indexes.
  • Clustered and non-clustered indexes.
  • Partitioned and nonpartitioned indexes.
  • Bidirectional indexes.
  • Expression-based indexes.

Which is Oracle 12c new features you latest features of?

Oracle 12c uses the advanced indexing techniques as compare to oracle 11g.In oracle 11G user can create only one index on one column.The oracle 12c gives user the right to create multiple indexes on same column.To create multiple indexes on same column user needs to use the different type of index.

Is it illegal to have multiple tables in Oracle Database 12c?

Beginning with Oracle Database 12c, a single table can be the null-generated table for multiple tables. Prior to Oracle Database 12c, having multiple tables on the left hand side of an outer join was illegal and resulted in an ORA-01417 error. The only way to execute such a query was to translate it into ANSI syntax.

How to create a partial index in 12C?

With 12c, there is now the capability to only index those partitions that are of interest to us, which with proper design can also be implemented such that only those column values of interest are included within an index. Now lets drop the index that we created earlier and now create a PARTIAL INDEX:- Index dropped. Index created.

Which is Oracle 12c default values for columns?

Default values for columns can directly refer to Oracle sequences. Valid entries are sequence.CURVAL and sequence.NEXTVAL. Providing the functionality to directly refer to a sequence as a default value expression simplifies code development.