Example of How the Character Set is Determined for the Query - 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™

The character set of the expression in the first SELECT statement determines the character set of the entire query. In the following example, the character set of <char_expression_1> is used as the character set for the entire query:

SELECT <char_expression_1> FROM <table_1>
UNION
SELECT <char_expression_2> FROM <table_2>;

If <char_expression_2> contains characters not included in the character set of <char_expression_1>, an error can result.

For example, if <char_expression_1> is CHARACTER SET LATIN, but <char_expression_2> is CHARACTER SET UNICODE, attempting to translate <char_expression_2> from UNICODE to LATIN results in an error if multi-byte characters are present in <char_expression_2>.