Teradata MultiLoad

Teradata MultiLoad is a powerful tool used for loading and deleting large amounts of data into a Teradata database table. It is an efficient and high-speed utility designed for batch operations with significant data volumes.

Features

Some features of Teradata MultiLoad include:

• Fast loading of massive data volumes
• Ability to load data into multiple tables with one job
• Ability to delete and update data in addition to loading
• Error handling and logging capabilities
• Recovery and restart facilities
• Multiple sessions per job for concurrent processing

Advantages

Using Teradata MultiLoad provides several advantages, such as:

• High throughput for batch loading and processing
• Flexibility for loading, deleting, or updating data
• Increased efficiency and productivity
• Support for multiple input data formats and sources
• Easy to use with a simple yet powerful command language

Usage

To use Teradata MultiLoad, you need to create a set of scripts that define the input data format, the target tables and columns, and the loading, deleting, or updating rules. The scripts also specify the error handling, logging, and recovery settings.

Here is an example script:

.LOGTABLE mylogtable;
.LOGON myteradataserver/username,password;

BEGIN MLOAD TABLE mytable
  WORKTABLES myworktable1, myworktable2, myworktable3
  INMOD myinputmodule
  ERRORTABLE myerrortable;

LAYOUT inputlayout;
FIELD id * INTEGER;
FIELD name * CHAR(30);
FIELD age * INTEGER;

IMPORT INFILE myinputfile;
     LAYOUT inputlayout;

.APPLY INSERT INTO mytable
     (id, name, age)
     VALUES
     (:id, :name, :age);

.END MLOAD;

.LOGOFF;

This script logs in to the Teradata server, defines the target table and work tables, specifies the input data format and source file, and applies the insert operation. It also creates a log table and an error table for tracking and capturing any errors or exceptions.

Conclusion

Teradata MultiLoad is a powerful tool for loading, deleting, and updating large amounts of data into a Teradata database table. It offers high throughput, flexibility, and efficiency for batch processing and concurrent sessions. With its robust features and easy-to-use command language, it is an essential tool for any Teradata developer or administrator.