Available in versions: Dev (3.19) | Latest (3.18) | 3.17 | 3.16 | 3.15 | 3.14 | 3.13 | 3.12 | 3.11 | 3.10 | 3.9
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 | +-------------+-----------+
Dialect support
This example using jOOQ:
cumeDist().over(orderBy(BOOK.ID))
Translates to the following dialect specific expressions:
-- AURORA_POSTGRES, BIGQUERY, COCKROACHDB, DB2, DUCKDB, EXASOL, FIREBIRD, H2, HANA, INFORMIX, MARIADB, MYSQL, ORACLE, -- POSTGRES, REDSHIFT, SNOWFLAKE, SQLDATAWAREHOUSE, SQLITE, SQLSERVER, SYBASE, TERADATA, TRINO, VERTICA, YUGABYTEDB cume_dist() OVER (ORDER BY BOOK.ID) -- MEMSQL (CAST(count(*) OVER ( ORDER BY BOOK.ID RANGE UNBOUNDED PRECEDING ) AS decimal) / count(*) OVER ( ORDER BY BOOK.ID RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING )) -- ACCESS, ASE, AURORA_MYSQL, DERBY, HSQLDB /* UNSUPPORTED */
(These are currently generated with jOOQ 3.19, see #10141), or translate your own on our website
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