: Building on 12c R1, Release 2 introduced PDB Hot Clone , allowing you to clone pluggable databases without taking them offline. It also expanded capacity to support up to 4,000 PDBs per container database.

Oracle Database 12c Release 2 (12.2) marked a pivotal shift for the world's most popular database, introducing a "cloud-first" architecture that remains a cornerstone for hybrid environments. While officially superseded by later versions, 12c R2 continues to be a highly sought-after tool for developers and DBAs looking to master modern database concepts like multitenancy and sharding. Key Innovations in 12c Release 2

: Finally moving past the 30-byte limit, names for tables, columns, and other objects can now be up to 128 bytes , simplifying migrations from other platforms.