How To Load Data through External Tables

Home > Oracle > Data Load

Q

How To Load Data through External Tables? - Oracle DBA FAQ - Loading and Exporting Data

✍: FYIcenter.com

A

If you have data stored in external files, you can load it to database through an external table by the steps below:

Create an external table with columns matching data fields in the external file.
Create a regular table with the same columns.
Run an INSERT INTO ... SELECT statement to load data from the external file to the regular table through the external table.

2007-04-30, 5137👍, 0💬

How To Load Data with SQL*Loader
How To Load Data with SQL*Loader? - Oracle DBA FAQ - Loading and Exporting Data Let's say you have a table defined as: CREATE TABLE student (id NUMBER(5) PRIMARY KEY, first_name VARCHAR(80) NOT NULL, last_name VARCHAR(80) NOT NULL, birth_date DATE NOT NULL, social_number VARCHAR(80) UNIQUE NOT NULL)... 2007-04-30, 5784👍, 0💬

What Is an External Table
What Is an External Table? - Oracle DBA FAQ - Loading and Exporting Data An external table is a table defined in the database with data stored outside the database. Data of an external table is stored in files on the operating systems. Accessing data of external tables are done through data access d... 2007-04-30, 5687👍, 0💬

What Are the Restrictions on External Table Columns
What Are the Restrictions on External Table Columns? - Oracle DBA FAQ - Loading and Exporting Data When creating external table columns, you need to watch out some restrictions: "PRIMARY KEY" is not allowed. "NOT NULL" is not allowed. "DEFAULT value" is not allowed. 2007-04-30, 5525👍, 0💬

How To Load Data from External Tables to Regular Tables
How To Load Data from External Tables to Regular Tables? - Oracle DBA FAQ - Loading and Exporting Data Once you have your data entered in a text file, and an external table defined to this text file, you can easily load data from this text file to a regular table. The following tutorial exercise sho... 2007-05-01, 5478👍, 0💬

What Is a SQL*Loader Control File
What Is a SQL*Loader Control File? - Oracle DBA FAQ - Loading and Exporting Data A SQL*Loader control file a text that defines how data files should be loaded into the database. It allows you to specify: Where is the input data file. The format of the input date file. The target table where the data... 2007-04-30, 5391👍, 0💬

How To Define an External Table with a Text File
How To Define an External Table with a Text File? - Oracle DBA FAQ - Loading and Exporting Data You can use the CREATE TABLE statement to create external tables. But you need to use ORGANIZATION EXTERNAL clause to specify the external file location and the data access driver. The tutorial exercise b... 2007-04-30, 5378👍, 0💬

What Is a Directory Object
What Is a Directory Object? - Oracle DBA FAQ - Loading and Exporting Data A directory object is a logical alias for a physical directory path name on the operating system. Directory objects can be created, dropped, and granted access permissions to different users. The following tutorial exercise sh... 2007-04-30, 5180👍, 0💬

How To Load Data through External Tables
How To Load Data through External Tables? - Oracle DBA FAQ - Loading and Exporting Data If you have data stored in external files, you can load it to database through an external table by the steps below: Create an external table with columns matching data fields in the external file. Create a regul... 2007-04-30, 5138👍, 0💬

How To Export Data with a Field Delimiter
How To Export Data with a Field Delimiter? - Oracle DBA FAQ - Loading and Exporting Data The previous exercise allows you to export data with fixed field lengths. If you want export data with variable field lengths and field delimiters, you can concatenate your fields with an expression in the SELEC... 2007-04-30, 5079👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.