Joins and Aggregation in View Definitions - 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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dita:id
B035-1184
lifecycle
latest
Product Category
Teradata Vantage™

When defining a non-updatable view, you can specify one or more aggregate operators (SUM, AVG, MAX, MIN, and COUNT) in the SELECT expression list or in the conditional expression of a HAVING clause. Creating views with aggregation can eliminate the need to create and delete temporary tables. For many applications, an aggregate join index might be a more optimal solution. For more information about aggregate join indexes, see Aggregate Join Indexes, Optimizer Rules for Using Aggregate Join Indexes in a Query Plan, andTeradata Vantage™ - Database Design, B035-1094.

Aggregate operators cannot be used in the conditional expression of a WHERE clause.