What is the correct syntax for transforming an email address into a username in Okta?

The correct syntax for transforming an email address into a username in Okta is to use the function that extracts the substring before the '@' character in the email address. This is crucial for converting an email into a username, as usernames are typically the part before the domain in an email.

In this case, the function substringBefore("jsmith@oktaice.com", '@') effectively retrieves "jsmith", which is precisely the username derived from the given email address. It demonstrates a straightforward manipulation of string data, focusing specifically on extracting the required segment before a specified delimiter, in this instance, the '@' character.

The other options do not correctly apply the necessary functions or syntax to yield the intended result. While some may involve addressing the case of the string or manipulating substrings, they either use incorrect formatting or incorrectly execute the operations to achieve the desired outcome of extracting a username from an email address. Thus, the choice that involves directly using substringBefore with the email address and the '@' delimiter provides the clear and correct approach for this transformation.