EXISTS Quantifier - Analytics Database - Teradata Vantage

SQL Data Manipulation Language

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
2024-04-05
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lifecycle
latest
Product Category
Teradata Vantage™

SQL supports the EXISTS () logical quantifier for testing the result of subquery search conditions. See Specifying Subqueries in Search Conditions. For more information about the EXISTS quantifier, see Teradata Vantage™ - SQL Functions, Expressions, and Predicates, B035-1145.

If the subquery would return response rows, then the WHERE condition is considered to be satisfied. Specifying the NOT qualifier for the EXISTS predicate inverts the test.

A subquery used in a search condition does not return any rows. It returns a boolean value to indicate whether responses would or would not be returned.

The subquery can be correlated with an outer query.