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, MEMSQL, ORACLE, POSTGRES, REDSHIFT, SQLDATAWAREHOUSE, SQLSERVER, TERADATA
percentile_cont(0E0) WITHIN GROUP (ORDER BY BOOK.ID)

-- H2
percentile_cont(CAST(0E0 AS double)) WITHIN GROUP (ORDER BY BOOK.ID)

-- ACCESS, ASE, AURORA_MYSQL, BIGQUERY, COCKROACHDB, DERBY, EXASOL, FIREBIRD, HANA, HSQLDB, IGNITE, INFORMIX, MARIADB, MYSQL, 
-- SNOWFLAKE, SQLITE, SYBASE, VERTICA
/* UNSUPPORTED */

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

The jOOQ User Manual : SQL building : Column expressions : Aggregate functions : PERCENTILE_CONT

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