Download Oracle 10g/11g Data and Database Management Utilities by Hector R. Madrid PDF

By Hector R. Madrid

This booklet is written utilizing a pragmatic technique that courses you thru assorted functional eventualities. It presents a quick creation to the subjects; this manner you could speedy get to grasp the most gains, commence being efficient with the instrument, and develop with it at a quick speed. you will not need to spend an excessive amount of time attending to the fundamentals of the instrument and will instantly growth in the direction of the complex information. utilizing this functional procedure you do not have to spend invaluable time attempting to decipher arid reference manuals; you could simply organize the sensible eventualities, and take a look at to stick with up the displays. the photographs utilized in the ebook come from genuine situations, and the output is often defined so that you can simply interpret what's being displayed at the monitor after issuing the instructions. This ebook is geared toward all Oracle execs who engage with the database throughout the facts and database utilities and are prepared to optimize their interplay with it. Entry-level clients gets familiar with the easiest practices to get their activity performed in a well timed and effective demeanour. complicated clients will locate valuable tips and How-Tos that may aid them specialize in getting the main out of the database utilities and fine-tune batch processing.

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P #1, , lubbock, , 79423 Chapter 2 Datafile: This is the actual plain-data file. This datafile must have a consistent format (along with its contents) according to the predefined format described by the control file. This is the source file and under certain circumstances, such as a one-time load, this file may also have the control file contents embedded. There may be more than one datafile for a single data load, the number of datafiles is specified in the control file. Controlfile: This file describes the way data is structured; it specifies whether the record will have a commonly used record delimited by a carriage return, or a record that spans several lines.

In case it is not specified this way, it must be declared at the control file with the CHARACTERSET parameter. The character set will automatically be converted to the specified character set as long as the target database supports the conversion, otherwise a question mark will be loaded instead, indicating that the target database either didn't understand the conversion or the character set at the target database is not a superset of the source character set data. In this example a load takes place using different character sets on this table, the purpose of the table is to store a multilingual error catalog: CREATE TABLE ERRORCATALOG ( LANGUAGE VARCHAR2(3), ERROR_NUMBER NUMBER(6), ERROR_STRING NVARCHAR2(1000) ); The first datafile to store is in Japanese, the second demo is Chinese and several other control files are prepared to load different languages for this multilingual demonstration table.

This material is copyright and is licensed for the sole use by Paul Corcorran on 5th July 2009 8601 ave. p #1, , lubbock, , 79423 SQL*Loader SQL*Loader basics Sometimes, an external source provides data in an unwanted format. As database users, we can only deal with whatever way the data has been formatted, and do our best to load it. Sometimes an interface has to be built specifically to perform a complex format load. The purpose of SQL*Loader is not only to provide a plain format data loader tool, but also a means to allow a complex data set to be loaded.

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