CASE Expressions - Analytics Database - Teradata Vantage

SQL Functions, Expressions, and Predicates

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
2024-01-12
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lifecycle
latest
Product Category
Teradata Vantageā„¢

Specifies alternate values for a conditional expression or expressions based on equality comparisons and conditions that evaluate to TRUE.

CASE provides an efficient and powerful method for application developers to change the representation of data, permitting conversion without requiring host program intervention.

For example, you could code employee status as 1 or 2, meaning full-time or part-time, respectively. For efficiency, the system stores the numeric code but prints or displays the appropriate textual description in reports. This storage and conversion is managed by Vantage.

In addition, CASE permits applications to generate nulls based on information derived from the database, again without host program intervention. Conversely, CASE can be used to convert a null into a value.