Aggregate Join Indexes - 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™

An aggregate join index is a join index that specifies SUM, COUNT, MIN, or MAX aggregate operations. No other aggregate functions are permitted in the definition of a join index.

The primary function of an aggregate join index is to provide the Optimizer with a high-performing, cost-effective means for satisfying any query that specifies a frequently made aggregation operation on one or more columns. The aggregate join index permits you to define a summary table without violating schema normalization.