Hi
I wonder how to 'safely' delete an user in SQL command ?

My site have thousands of inactive users , that is , no post , no PMs ... I want to delete these users , but not by web GUI (it is too inefficient)

I want to find user with ubbt_USER_PROFILE.USER_TOTAL_POSTS = 0 and ubbt_USER_PROFILE.USER_TOTAL_PM = 0 ,

Can I safely delete him just in ubbt_USERS ?

Code
select USER_ID , 
       USER_LOGIN_NAME , 
       USER_DISPLAY_NAME ,
       USER_REGISTRATION_EMAIL ,
       count(USER_REGISTRATION_EMAIL) as c
       from ubbt_USERS 
       join ubbt_USER_PROFILE using (USER_ID)
       where ubbt_USER_PROFILE.USER_TOTAL_POSTS = 0
       and   ubbt_USER_PROFILE.USER_TOTAL_PM = 0       
       group by USER_REGISTRATION_EMAIL
       having ( count(USER_REGISTRATION_EMAIL)  > 1)
       order by USER_ID;

UBBT 7.5.2

English is not my native language. I try my best to express my thought precisely. I hope you understand what I mean. If any misunderstanding results from culture gaps, I apologize first.