LENGTH

LENGTH is applied to either a character string expression or a bit string expression and returns the number of characters in the result.

Because all built-in data types are implicitly converted to strings, this function can act on all built-in data types.

LENGTH ( { CharacterExpression | BitExpression } )

-- returns 20
VALUES LENGTH('supercalifragilistic')
-- returns 1
VALUES LENGTH(X'FF')
-- returns 4
VALUES LENGTH(1234567890)