android barcode scanner javascript Performing Database Recovery in Software

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8 D The ADR resides in files in the DIAGNOSTIC_DEST directory A, B, and C are wrong because they all imply storage within the database, which is not correct E is wrong because although Enterprise Manager can read the ADR, it does not manage it 9 A The already populated list of failures will be used for generating advice B and C are wrong because the new failure will not be in the list and so will not be advised upon D is wrong because the generated list is still valid just out of date 10 C A non-critical datafile can be restored and recovered in open mode A is wrong because controlfile damage will always abort the instance B is wrong because members of the current group cannot be repaired D is wrong because unfortunately not even the DRA can do everything
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If using Database Control, the wizard should walk you through the whole process except the online log file member repair If using command-line utilities, once in nomount mode connect with RMAN Use LIST FAILURE, ADVISE FAILURE, and REPAIR FAILURE At this stage, this will only detect and repair the controlfile problem, but you can now mount the database Repeat the LIST-ADVISE-REPAIR cycle to repair the datafile damage, and open the database Finally, clear the damaged log file group to rebuild the missing member If you find that your database cannot be recovered no matter what you try, the last resort is a full restore From the RMAN prompt, use these commands:
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restore database force; recover database;
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In the real world, this would be a bad option because of the downtime involved in a complete restore
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CERTIFICATION OBJECTIVES
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1801 Describe and Use Methods to Move Data (Directory Objects, SQL*Loader, External Tables) Explain the General Architecture of Oracle Data Pump 1803 Use Data Pump Export and Import to Move Data Between Oracle Databases Two-Minute Drill Self Test
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18:
Moving Data
here are many situations where bulk transfers of data into a database or between databases are necessary Common cases are populating a data warehouse with data extracted from transaction processing systems, or copying data from live systems to test or development environments As entering data with standard INSERT statements is not always the best way to do large-scale operations, the Oracle database comes with facilities for designed for bulk operations These are SQL*Loader and Data Pump There is also the possibility of reading data without ever actually inserting it into the database; this is accomplished through use of external tables
CERTIFICATION OBJECTIVE 1801
Describe and Use Methods to Move Data (SQL Loader, Directory Objects, External Tables)
SQL*Loader is a tool for inserting data into an Oracle database There are restrictions on the layout of the data, but SQL*Loader can be configured to read a wide variety of formats It is user process, which establishes a session against the database Use of external tables lets data in SQL*Loader compatible files be read interactively by sessions, as though the data were stored in an internal table It is also possible to write data out to an external table Directory objects are required when using external tables (and also when using Data Pump, dealt with in a later section) to provide a layer of abstraction between the storage of the source data by the operating system, and the reading of the data by the Oracle database sessions
SQL*Loader
In many cases, you will be faced with a need to do a bulk upload of datasets generated from some third-party system This is the purpose of SQL*Loader The input files may be generated by anything, but as long as the layout conforms to something that SQL*Loader can understand, it will upload the data successfully Your task as DBA is to configure a SQL*Loader control file that can interpret the contents of the input data files; SQL*Loader will then insert the data Architecturally, SQL*Loader is a user process like any other: it connects to the database via a server process To insert rows, it can use two techniques: conventional
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