New PDF release: Oracle SQL*Loader: the definitive guide

By Jonathan Gennick, Sanjay Mishra

SQL*Loader is a ubiquitous instrument within the Oracle global. it's been shipped with Oracle considering that no less than model 6 and remains to be supported and greater with each one re-creation of Oracle, together with Oracle8 and Oracle8i. The activity of SQL*Loader is to load info from flat records into an Oracle database. it is optimized for loading huge volumes of knowledge, and is versatile sufficient to deal with almost any enter layout. nearly each Oracle person has to exploit SQL*Loader at one time or one other, and DBAs are usually known as upon to load info for the clients of their association. regardless of SQL*Loader's vast availability and utilization, few DBAs and builders understand how to get the main out of it. Oracle SQL*Loader: The Definitive advisor has every thing you must recognize to place SQL*Loader to its most sensible use: an creation to SQL*Loader, a connection with all of its syntax techniques, and most significantly, step by step directions for all of the SQL*Loader initiatives you would are looking to practice - and perhaps a few you did not detect you may practice. you will the way to build the required regulate documents and cargo from forms of records containing forms of info (e.g., fixed-width facts, delimited facts, and information of varied datatypes). you will additionally the right way to validate facts, load it selectively, rework it because it is loaded, and get well after failure. This publication explains the way to optimize SQL*Loader functionality by way of adjusting the transaction measurement and utilizing the recent direct direction choice. It additionally covers the latest SQL*Loader gains - the loading of huge item (LOB) columns and the hot item kinds (nested tables, various arrays, and item tables). Oracle SQL*Loader: The Definitive advisor is an vital source for a person who's new to SQL*Loader; a task-oriented studying software in the event you are already utilizing it; and a short reference for each person. so one can take top benefit of a vital Oracle instrument, you wish this booklet.

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SQL*Loader includes functionality for dealing with whitespace, delimiters, and null data. • In addition to standard relational tables, SQL*Loader can load data into object tables, varying arrays (VARRAYs), and nested tables. • SQL*Loader can load data into large object (LOB) columns. • SQL*Loader can handle character set translation between the input data file and the database. The capabilities in this list describe the types of data that SQL*Loader can handle, and what SQL*Loader can do to with that data.

Only one LOAD statement is allowed in a control file. Specifying Input Files To load data, you need a source. Usually that source will be a file other than the control file. Use the LOAD statement’s INFILE clause to specify one or more operating system files as the source of the data to be loaded. The syntax is as follows: {INFILE | INDDN} {filename|*} [os_specific_options] [{BADFILE | BADDN} badfile_name] [{DISCARDFILE | DISCARDDN} discardfile_name] [{DISCARDS | DISCARDMAX} discardmax] The keywords INDDN, BADDN, and DISCARDDN exist to provide compatibility with IBM DB2, and are rarely used.

23781 Page 3 Wednesday, April 11, 2001 1:42 PM The SQL*Loader Environment 3 • The correspondence between the fields in the input record and the columns in the database tables being loaded • Selection criteria defining which records from the input file contain data to be inserted into the destination database tables. • The names and locations of the bad file and the discard file Some of the items shown in this list may also be passed to SQL*Loader as commandline parameters. The name and location of the input file, for example, may be passed on the command line instead of in the control file.

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