It is the set of before image data blocks that contain rows that are modified by a transaction.
Each Rollback Segment entry must be completed within one rollba...
Querying the DBA_ROLLBACK_SEGS view
The status available as follows :
IN USE - Rollback Segment is on-line
AVAILABLE - Rollback Segment available bur not on-...
SYSTEM - Data dictionary tables.
DATA - Standard operational tables.
DATA2- Static tables used for standard operations
INDEXES - Indexes for Standard operat...
Simple Tablespace:    Can contain one or more tables. Rows from multiple tables can be interleaved on a page under the DBA’s control and maintenance...
DDL (Data Definition Language) statements are used to define the database structure or schema. Some examples:
1. CREATE - to create objects in the database...
Rolling forward to recover data that has not been recorded in data files, yet has been recorded in the on-line redo log, including the contents of rollback segm...