ruwiki: Users with no Cyrillic and Latin symbols in username

SQL

use ruwiki_p;

select user_name, user_registration
from user
where not (
  user_name regexp '[[:alpha:]]' or
  instr(user_name, 'a') or instr(user_name, 'b') or instr(user_name, 'c') or instr(user_name, 'd') or instr(user_name, 'e') or instr(user_name, 'f') or instr(user_name, 'g') or instr(user_name, 'h') or instr(user_name, 'i') or instr(user_name, 'j') or instr(user_name, 'k') or instr(user_name, 'l') or instr(user_name, 'm') or instr(user_name, 'n') or instr(user_name, 'o') or instr(user_name, 'p') or instr(user_name, 'q') or instr(user_name, 'r') or instr(user_name, 's') or instr(user_name, 't') or instr(user_name, 'u') or instr(user_name, 'v') or instr(user_name, 'w') or instr(user_name, 'x') or instr(user_name, 'y') or instr(user_name, 'z'))
order by user_registration desc
limit 100

SQL

Checking query status...