Untitled query #32099

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

SQL

USE enwiki_p;
WITH DEDUPE AS (
  SELECT *
  , ROW_NUMBER() OVER ( PARTITION BY ug_user ORDER BY ug_user ) AS OCCURENCE
  FROM user_groups
)
SELECT *, COUNT(*) FROM DEDUPE
WHERE OCCURENCE = 1
GROUP BY ug_group

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SQL

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