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The SQL*Plus FLASHBACK DATABASE command performs the same function as the RMAN FLASHBACK DATABASE command: it returns the database to a prior state. Note that using Flashback Database requires that you create a flash recovery area for your database and enable the collection of flashback logs. See Oracle Database Backup and Recovery Basics for more details about how the Flashback Database feature..

The SQL*Plus FLASHBACK DATABASE command performs the same function as the RMAN FLASHBACK DATABASE command: it returns the database to a prior state. Note that using Flashback Database requires that you create a flash recovery area for your database and enable the collection of flashback logs. See Oracle Database Backup and Recovery Basics for more details about how the Flashback Database feature..

Oracle's flashback features, which let you undo damage to your database after logical data corruption, include the following: Oracle Flashback Database, which returns your entire database to a previous state without requiring you to restore files from backup; Oracle Flashback Table, which returns one or more tables to their contents at a previous time; Oracle Flashback Drop, which undoes the eff..

Oracle's flashback features, which let you undo damage to your database after logical data corruption, include the following: Oracle Flashback Database, which returns your entire database to a previous state without requiring you to restore files from backup; Oracle Flashback Table, which returns one or more tables to their contents at a previous time; Oracle Flashback Drop, which undoes the eff..

When you drop a table, the Oracle server doesn't actually remove the table. Instead, it places the table into the recycle bin of the Oracle server, which means the space that the dropped table was holding still exists and the table can be recovered from the recycle bin by using FLASHBACK TABLE statement. However, if you use this option, PURGE, with a sql statement when you drop a table, the orac..

When you drop a table, the Oracle server doesn't actually remove the table. Instead, it places the table into the recycle bin of the Oracle server, which means the space that the dropped table was holding still exists and the table can be recovered from the recycle bin by using FLASHBACK TABLE statement. However, if you use this option, PURGE, with a sql statement when you drop a table, the orac..

Based on expressions Built from table columns, constants, SQL functions, and user-defined functions. Examples) CREATE INDEX upper_dept_name_index ON dept2(UPPER(department_name)); SELECT * FROM dept2 WHERE UPPER(department_name) = 'SALES' The function-based index is used only when a query uses a particular function in the query otherwise the Oracle server may perform a full table scan.

OverviewAutomatically- PRIMARY KEY- UNIQUE KEYManually- CREATE INDEX- CREATE TABLE CREATE INDEX with CREATE TABLE statementExamples)CREATE TABLE NEW_EMP(employee_id NUMBER(6) PRIMARY KEY USING INDEX (CREATE INDEX emp_id_idx ON NEW_EMP(employee_id)first_name VARCHAR2(20),last_name VARCHAR2(25)); SELECT INDEX_NAME, TABLE_NAMEFROM USER_INDEXESWHERE TABLE_NAME = 'NEW_EMP';** An index cannot be modif..

OverviewAutomatically- PRIMARY KEY- UNIQUE KEYManually- CREATE INDEX- CREATE TABLE CREATE INDEX with CREATE TABLE statementExamples)CREATE TABLE NEW_EMP(employee_id NUMBER(6) PRIMARY KEY USING INDEX (CREATE INDEX emp_id_idx ON NEW_EMP(employee_id)first_name VARCHAR2(20),last_name VARCHAR2(25)); SELECT INDEX_NAME, TABLE_NAMEFROM USER_INDEXESWHERE TABLE_NAME = 'NEW_EMP';** An index cannot be modif..