Example: UPDATE|Stand Alone utility - Usage Notes - MultiLoad

Teradata® MultiLoad Reference - 20.00

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
Lake
VMware
Product
MultiLoad
Release Number
20.00
Published
October 2023
Language
English (United States)
Last Update
2024-03-18
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Product Category
Teradata Tools and Utilities

The following table describes the things to consider when using the UPDATE statement.

UPDATE Usage Notes 
Topic Usage Notes
OR Construct The OR construct cannot be used in an UPDATE statement.

To accomplish the result normally achieved with the OR construct, use two separate UPDATE statements and use the APPLY clause of the IMPORT command to apply them conditionally.

Referencing Field Names Make references to fields of the input data records for the expr and WHERE conditional as follows:
:fieldname

where fieldname is defined by a FIELD or TABLE command of the layout referenced by an IMPORT command using this UPDATE statement.

For the WHERE condition clause, the equality values for all the columns of the primary index must be explicitly specified.

Required Privileges To use the UPDATE statement, the UPDATE privilege on the tname table or view is required.
Specifying Multiple UPI Columns in an Import Task If multiple UPI columns in an import task are specified, specify them all in the WHERE clause of the UPDATE statement.

In this case, the WHERE clause is fully qualified, thereby allowing Teradata MultiLoad to optimize the processing.

Update Object Restrictions If the object of the UPDATE statement is a view, it must not specify a join. Teradata MultiLoad operates only on single tables, so UPDATE statements must not contain any joins.

Only one object may be identified and that must be a target object as specified in the BEGIN MLOAD command.