ruwiki: Users with no Cyrillic and Latin symbols in username

SQL

use ruwiki_p;

select user_name, user_registration
from user
where not (
regexp(user_name, '[[:alpha:]]') or
  instr(user_name, 'а') or instr(user_name, 'б') or instr(user_name, 'в') or instr(user_name, 'г') or instr(user_name, 'д') or instr(user_name, 'е') or instr(user_name, 'ё') or instr(user_name, 'ж') or instr(user_name, 'з') or instr(user_name, 'и') or instr(user_name, 'й') or instr(user_name, 'к') or instr(user_name, 'л') or instr(user_name, 'м') or instr(user_name, 'н') or instr(user_name, 'о') or instr(user_name, 'п') or instr(user_name, 'р') or instr(user_name, 'с') or instr(user_name, 'т') or instr(user_name, 'у') or instr(user_name, 'ф') or instr(user_name, 'ъ') or instr(user_name, 'ц') or instr(user_name, 'ч') or instr(user_name, 'ш') or instr(user_name, 'щ') or instr(user_name, 'ъ') or instr(user_name, 'ы') or instr(user_name, 'ь') or instr(user_name, 'э') or instr(user_name, 'ю') or instr(user_name, 'я'))
order by user_registration desc
limit 10
SQL

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