STDDEV_POP()
This page is part of MariaDB's Documentation.
The parent of this page is: Functions for MariaDB Enterprise Server
Topics on this page:
Overview
A description for this Function has not yet been added to this Documentation.
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
EXTERNAL REFERENCES
Additional information on this topic may be found in the MariaDB Public Knowledge Base.