%EXACT(expression) %EXACT expression
|expression||A string expression, which can be the name of a column, a string literal, or the result of another function, where the underlying data type can be represented as any character type (such as CHAR or VARCHAR2).|
%EXACT returns expression in the EXACT collation sequence. This collation sequence orders pure numeric values (values for which x=+x) in numeric order first, followed by all other characters in string order.
The EXACT collation sequence for strings is the same as the ANSI-standard ASCII collation sequence: digits are collated before uppercase alphabetic characters and uppercase alphabetic characters are collated before lowercase alphabetic characters. Punctuation characters occur at several places in the sequence.
%EXACT passes through NULLs unchanged.
%EXACT is a Caché SQL extension and is intended for SQL lookup queries.
%EXACT collates an input string as either wholly numeric or as a mixed-character string in which numbers are treated the same as any other character. Compare this to %MVR collation, which sorts a string based on the numeric substrings within the string.
The following examples uses %EXACT to return all Name values that are higher in the collating sequence than 'Smith'. The first example uses parentheses syntax, the second omits the parentheses.
SELECT Name FROM Sample.Person WHERE Name > 'Smith'
SELECT Name FROM Sample.Person WHERE %EXACT(Name) > 'Smith'
SELECT Name FROM Sample.Person WHERE %EXACT Name > 'Smith'