Category: Architecture

fncbased_indx

Understanding ROWID In Oracle Database

Every record has a unique ROWID (pseudocolumn) within a database representing the physical location on disk where the record lives….

index_compression

Understanding Index Compression In Oracle Database 19c

From Oracle 9i onward both non-unique and unique indexes can be compressed to save disk space. The COMPRESS [N] clause…

split_partition

Understanding DELETE vs TRUNCATE In Oracle Database

In Oracle, Segment Space Management is managing the space within a segment. In a segment generally you have USED block…

split_partition

Understanding DBMS_SHARED_POOL Package

The DBMS_SHARED_POOL package provides access to the shared pool, which is the shared memory area where cursors and PL/SQL objects…

split_partition

Row Migration Vs Row Chaining

Oracle database allocates logical space for all data in the database. Logical storage structures are recognized by Oracle DB and…

index_compression

Understanding LOCKING In Database

CONCURRENT access is accessing same data by multiple users at the same time. • SHARED lock is acquired when user…

split_partition

Understanding TRANSACTIONS In Database

What Is A Transaction ? Transaction is logically joining multiple SQL statements (unit of work) which we can either commit/rollback.In…

Oracle-Flashback

Understanding FLASHBACK Technology

In Oracle database,under SGA there is an optional memory component known as – Flashback buffer.When Flashback Database is enabled, the…