Dropping Columns from a Normalized Table - Analytics Database - Teradata Vantage

SQL Data Definition Language Detailed Topics

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
VMware
Product
Analytics Database
Teradata Vantage
Release Number
17.20
Published
June 2022
Language
English (United States)
Last Update
2023-07-11
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B035-1184
lifecycle
latest
Product Category
Teradata Vantage™
The following rules and restrictions apply to dropping columns from a normalized table.
  • You can drop any column from a normalized table, including ignore columns.
  • Dropping a normalized Period column also drops the NORMALIZE clause from the table definition.
  • Vantage renormalizes a normalized table if you drop a column that is not specified in the ignore column list from the table or when a column is added to the ignore column list.
  • You can use an ALTER TABLE request to alter the normalize_ignore_columns column list by specifying the DROP NORMALIZE option. This include the complete list - normalize clause and the ignore columns.
  • You cannot add and drop normalization from a table within the same ALTER TABLE request.

For information about adding columns to a normalized table, see Adding Columns to a Normalized Table.