wpdb get_results() returns only 2 rows

You can try below query

SELECT (
    SELECT count(*) 
    FROM wp_users as temp 
    WHERE DATE(temp.user_registered) = DATE(wp_users.user_registered)
    ) as counter, 
wp_users.*
FROM wp_users

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)