16.20 - Example: Using a Table Definition with CASESPECIFIC Attributes - Teradata Database

Teradata Vantageā„¢ - SQL Functions, Expressions, and Predicates

prodname
Advanced SQL Engine
Teradata Database
vrm_release
16.20
created_date
March 2019
category
Programming Reference
featnum
B035-1145-162K

Consider the following table definition where the character columns have CASESPECIFIC attributes:

   CREATE TABLE employee
     (last_name CHAR(32) CASESPECIFIC
     ,city      CHAR(32) CASESPECIFIC
     ,emp_id    CHAR(9)  CASESPECIFIC
     ,emp_ssn   CHAR(9)  CASESPECIFIC);

To compare on a case blind basis:

   SELECT emp_id
   FROM employee
   WHERE UPPER(emp_id) = UPPER(emp_ssn);

To compare with a string literal:

   SELECT emp_id
   FROM employee
   WHERE UPPER(city) = 'MINNEAPOLIS';

Teradata SQL also has the data type attribute NOT CASESPECIFIC, which allows case blind comparisons. Note that the data type attributes CASESPECIFIC and NOT CASESPECIFIC are Teradata extensions to the ANSI standard.