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CUME_DIST

Applies to ✅ Open Source Edition   ✅ Express Edition   ✅ Professional Edition   ✅ Enterprise Edition

CUME_DIST (or cumulative distribution) works like PERCENT_RANK, but assigns ranks between 1/N and 1

SELECT
  LANGUAGE_ID,
  cume_dist() OVER (ORDER BY LANGUAGE_ID)
FROM
  BOOK;
create.select(
         BOOK.LANGUAGE_ID,
         cumeDist().over(orderBy(BOOK.LANGUAGE_ID)))
     .from(BOOK)
     .fetch();

Producing:

+-------------+-----------+
| language_id | cume_dist |
+-------------+-----------+
|           1 |       0.5 |
|           1 |       0.5 | <-- Tied rows are both ranked first
|           2 |      0.75 |
|           4 |         1 |
+-------------+-----------+
cumeDist().over(orderBy(BOOK.ID))

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