enwiki usernames containing banned characters

This query is marked as a draft This query has been published by Tamzin.

SQL

SELECT COUNT(REGEXP_REPLACE(user_name, "[^%/@:=]", "")) AS instances,
       REGEXP_REPLACE(user_name, "[^%/@:=]", "") AS forbidden_characters
FROM user
WHERE (
  user_name LIKE "%\%%"
  OR user_name LIKE "%/%"
  OR user_name LIKE "%@%"
  OR user_name LIKE "%:%"
  OR user_name LIKE "%=%"
)
GROUP BY 2
ORDER BY 1 DESC

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