Which option is typically only used when utilizing self joins? display name
alias
relationship
primary key

relationship

Explanation: hope it helps

answer; i do believe that the correct answer is : a deadly factory fire;

to change your username, you must:

1) make sure what the username you want to change to is allowed in this community

2) contact a administrator (for example, jaysl)

3) through pm, tell the admin what you want to change to

4) if the username is allowed, it will be changed in a matter of seconds (minutes at most)

~