DEFINE FILE CAR
TEST1/A3 = IF COUNTRY LIKE '__A%' THEN 'YES' ELSE 'NO';
END
TABLE FILE CAR
PRINT
COUNTRY
TEST1
END

quote:

mask

Is an alphanumeric or text character string you supply. There are two wildcard characters that you can use in the mask: the underscore (_) indicates that any character in that position is acceptable; the percent sign (%) allows any following sequence of zero or more characters.

quote:

Reference: Restrictions on Masking Characters
The wildcard characters dollar sign ($) and dollar sign with an asterisk ($*), which are used with IS operators, are treated as literals with LIKE operators.

Masking with the characters $ and $* is not supported for compound WHERE phrases that use the AND or OR logical operators.