STDDEV_POP()

Overview

A description for this Function has not yet been added to this Documentation.

See also: Functions in 10.6 ES, in 10.5 ES, and in 10.4 ES

EXAMPLES

CREATE TABLE t1 (a INT, b INT);

INSERT INTO t1 VALUES
  (1,3), (1,5), (8,2), (5,7), (5,6),
  (10,1), (6,4), (3,9), (3,9), (7,2),
  (7,5), (2,6), (9,10), (9,5), (4,8);

SELECT b, STDDEV_POP(a) AS std_a
FROM t1 GROUP BY b ORDER BY b;

+------+--------+
| b    | std_a  |
+------+--------+
|    1 | 0.0000 |
|    2 | 0.5000 |
|    3 | 0.0000 |
|    4 | 0.0000 |
|    5 | 3.3993 |
|    6 | 1.5000 |
|    7 | 0.0000 |
|    8 | 0.0000 |
|    9 | 0.0000 |
|   10 | 0.0000 |
+------+--------+

As Window Function

SELECT a, b,
       STDDEV_POP(a) OVER () AS stddev_a,
       STDDEV_POP(b) OVER () AS stddev_b
FROM t1 ORDER BY a, b;

+------+------+----------+----------+
| a    | b    | stddev_a | stddev_b |
+------+------+----------+----------+
|    1 |    3 |   2.8674 |   2.6800 |
|    1 |    5 |   2.8674 |   2.6800 |
|    2 |    6 |   2.8674 |   2.6800 |
|    3 |    9 |   2.8674 |   2.6800 |
|    3 |    9 |   2.8674 |   2.6800 |
|    4 |    8 |   2.8674 |   2.6800 |
|    5 |    6 |   2.8674 |   2.6800 |
|    5 |    7 |   2.8674 |   2.6800 |
|    6 |    4 |   2.8674 |   2.6800 |
|    7 |    2 |   2.8674 |   2.6800 |
|    7 |    5 |   2.8674 |   2.6800 |
|    8 |    2 |   2.8674 |   2.6800 |
|    9 |    5 |   2.8674 |   2.6800 |
|    9 |   10 |   2.8674 |   2.6800 |
|   10 |    1 |   2.8674 |   2.6800 |
+------+------+----------+----------+

CHANGE HISTORY

Release Series

History

10.6 Enterprise

  • Present starting in MariaDB Enterprise Server 10.6.4-1.

10.5 Enterprise

  • Present starting in MariaDB Enterprise Server 10.5.3-1.

10.4 Enterprise

  • Present starting in MariaDB Enterprise Server 10.4.6-1.

EXTERNAL REFERENCES