Owo..So many features of Oracle 18C and i will share the new features soon.

PDB Lockdown Profile Enhancements
Refreshable PDB Switchover
PDB Snapshot Carousel
New Default Location of Oracle Database Password File
Read-Only Oracle Home
Oracle Data Guard Multi-Instance Redo Apply Supports Use of Block Change Tracking Files for RMAN Backups
Automatic Correction of Non-logged Blocks at a Data Guard Standby Database
Shadow Lost Write Protection
Backups from non-CDBs are usable after migration to CDB
Support for PDBs as Shards and Catalogs
User-Defined Sharding Method
Consistency Levels for Multi-Shard Queries
Manual termination of run-away queries
Approximate Top-N Query Processing
LOB support with IMC, Big Data SQL
Copy a PDB in an Oracle Data Guard Environment
Online Merging of Partitions and Subpartitions
Concurrent SQL Execution with SQL Performance Analyzer
Database In-Memory Support for External Tables
Memoptimized Rowstore
Integration of Active Directory Services with Oracle Database

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