It consists of one or more data files. one or more control files. two or more redo log files. The Database contains multiple users/schemas one...

The set of objects owned by user account is called the schema. 

Multiple   instances   accessing  the  same  database  (Only  In  Multi-CPU environments) 

A  database  instance  (Server) is a set of memory structure and background processes that access a set of database files. The...

The ANALYZE command.

Use the DBMS_SESSION.SET_SQL_TRACE or Use ALTER SESSION SET SQL_TRACE = TRUE;

These two Oracle utilities are used for loading data into the database. The difference is that the import utility relies on the data being produced...

TNSNAMES.ORA and SQLNET.ORA

ALTER TABLESPACE <tablespace_name> ADD DATAFILE <datafile_name> SIZE <size>

Data mapping is a very important aspect in data integration. In fact, it is the first step in the many complex tasks associated with data integration...