multiple fields in side table when using left join

If we take an example from this link https://editor.datatables.net/examples/simple/join.html and imagine that there is one more field in the sites table - the date. Now our request will look like this:

SELECT users.first_name,users.last_name,users.phone, sites.name, sites.date
FROM users
LEFT JOIN sites ON users.site = sites.id`

how to change this in js and server script?