SQL*Loader FAQ

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Contents
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1
What is SQL*Loader and what is it used for?
2
How does one use the SQL*Loader utility?
3
How does one load MS-Excel data into Oracle?
4
Is there a SQL*Unloader to download data to a flat file?
5
Can one load variable and fixed length data records?
6
Can one skip header records while loading?
7
Can one modify data as the database gets loaded?
8
Can one load data from multiple files/ into multiple tables at once?
9
Can one selectively load only the records that one needs?
10
Can one skip certain columns while loading data?
11
How does one load multi-line records?
12
How does one load records with multi-line fields?
13
How can one get SQL*Loader to COMMIT only at the end of the load file?
14
Can one improve the performance of SQL*Loader?
15
What is the difference between the conventional and direct path loader?
16
How does one use SQL*Loader to load images, sound clips and documents?
17
How does one load EBCDIC data?
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What is SQL*Loader and what is it used for?
SQL*Loader is a bulk loader utility used for moving data from external files into the Oracle database
. Its syntax is similar to that of the DB2
load utility, but comes with more options. SQL*Loader supports various load formats, selective loading, and multi-table loads.
SQL*Loader (sqlldr) is the utility to use for high
performance data loads. The data can be loaded from any text file and
inserted into the database.
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How does one use the SQL*Loader utility?
One can load data into an Oracle database by using the sqlldr (sqlload on some platforms) utility. Invoke the utility without arguments to get a list of available parameters. Look at the following example:
sqlldr username@server/password control=loader.ctl
sqlldr username/password@server control=loader.ctl
This sample control file (