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PERCENTILE_CONT

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

The PERCENTILE_CONT() aggregate function is an ordered set function that calculates a given continuous percentile of all input values. A special kind of percentile is the MEDIAN, corresponding to the 50% percentile.

SELECT 
  percentile_cont(0.00) WITHIN GROUP (ORDER BY ID),
  percentile_cont(0.25) WITHIN GROUP (ORDER BY ID),
  percentile_cont(0.50) WITHIN GROUP (ORDER BY ID),
  percentile_cont(0.75) WITHIN GROUP (ORDER BY ID),
  percentile_cont(1.00) WITHIN GROUP (ORDER BY ID)
FROM BOOK
create.select(
         percentileCont(0.00).withinGroupOrderBy(BOOK.ID),
         percentileCont(0.25).withinGroupOrderBy(BOOK.ID),
         percentileCont(0.50).withinGroupOrderBy(BOOK.ID),
         percentileCont(0.75).withinGroupOrderBy(BOOK.ID),
         percentileCont(1.00).withinGroupOrderBy(BOOK.ID))
      .from(BOOK)

Producing:

+------+------+------+------+------+
| 0.00 | 0.25 | 0.50 | 0.75 | 1.00 |
+------+------+------+------+------+
|    1 | 1.75 |  2.5 | 3.25 |    4 |
+------+------+------+------+------+

Dialect support

This example using jOOQ:

percentileCont(0.00).withinGroupOrderBy(BOOK.ID)

Translates to the following dialect specific expressions:

-- AURORA_POSTGRES, DB2, H2, MEMSQL, ORACLE, POSTGRES, REDSHIFT, SQLDATAWAREHOUSE, SQLSERVER, TERADATA
percentile_cont(0.0) WITHIN GROUP (ORDER BY BOOK.ID)

-- ACCESS, ASE, AURORA_MYSQL, COCKROACHDB, DERBY, FIREBIRD, HANA, HSQLDB, INFORMIX, INGRES, MARIADB, MYSQL, SQLITE, SYBASE, 
-- VERTICA
/* UNSUPPORTED */

(These are currently generated with jOOQ 3.15, see #10141)

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