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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, BIGQUERY, DB2, EXASOL, MARIADB, MEMSQL, ORACLE, POSTGRES, REDSHIFT, SNOWFLAKE, SQLDATAWAREHOUSE,
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, COCKROACHDB, DERBY, FIREBIRD, HANA, HSQLDB, INFORMIX, MYSQL, SQLITE, SYBASE, VERTICA
/* UNSUPPORTED */
```

(These are currently generated with jOOQ 3.18, see #10141), or translate your own on our website