QUALIFY Clause - Teradata Database - Teradata Vantage NewSQL Engine

SQL Data Manipulation Language

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Published
March 2019
Language
English (United States)
Last Update
2019-05-03
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Product Category
Teradata Vantage™

Purpose

A conditional clause in the SELECT statement that filters results of a previously computed ordered analytical function according to user-specified search conditions.

Syntax



Syntax Elements

QUALIFY
An introduction to a conditional clause that, similar to HAVING, further filters rows from a WHERE clause. The major difference between QUALIFY and HAVING is that with QUALIFY the filtering is based on the result of performing various ordered analytical functions on the data.
search_condition
One or more conditional expressions that must be satisfied by the result rows.
You can specify ordered analytical functions and scalar subqueries as search conditions with QUALIFY.
You can use aggregate operators and DEFAULT functions within a QUALIFY search condition.
The QUALIFY condition cannot reference LOB columns.
If you specify the value for a row-level security constraint in a search condition, that value must be expressed in its encoded form.

ANSI Compliance

The QUALIFY clause is a Teradata extension to the ANSI standard.

Related Topics

For more information related to the QUALIFY clause, see: