Example: Viewing Results for FALSE Conditions - Advanced SQL Engine - Teradata Database

SQL Functions, Expressions, and Predicates

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Published
July 2021
Language
English (United States)
Last Update
2021-07-28
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SQL_Functions__Expressions__and_Predicates.Upload_071421/djk1612415574830.ditamap
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SQL_Functions__Expressions__and_Predicates.Upload_071421/wrg1590696035526.ditaval
dita:id
B035-1145
lifecycle
previous
Product Category
Teradata Vantageā„¢

In this example, the session collation is ASCII.

CASE_N (a<'b', a>='ba' and a<'dogg' and b<>'cow', c<>'boy', NO CASE OR UNKNOWN)

The following table shows the result value returned by the above CASE_N function given the specified values for a, b, and c. x and yrepresent any value or NULL. The value 4 is returned when all the conditions are FALSE, or a condition is UNKNOWN with all preceding conditions evaluating to FALSE.

a b c Result
'a' x y 1
'boy' 'girl' y 2
'boy' NULL y 4
'boy' 'cow' 'man' 3
'boy' 'cow' 'boy' 4
'dog' 'ball' y 2
'dogg' x NULL 4
'dogg' x 'man' 3
'egg' x 'boy' 4
'egg' x NULL 4
'egg' x 'girl' 3