STDDEV()
This page is part of MariaDB's MariaDB 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 t (a INT, b INT);
INSERT INTO t VALUES
(1,5), (8,2), (5,6), (3,9), (3,9),
(7,2), (7,5), (2,6), (9,5);
SELECT b, STDDEV(a) FROM t GROUP BY b ORDER BY b;
+------+-----------+
| b | STDDEV(a) |
+------+-----------+
| 2 | 0.5000 |
| 5 | 3.3993 |
| 6 | 1.5000 |
| 9 | 0.0000 |
+------+-----------+
As Window Function
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(a) OVER () AS stddev_a
FROM t1
GROUP BY b
ORDER BY b;
+------+----------+
| b | stddev_a |
+------+----------+
| 1 | 2.9597 |
| 2 | 2.9597 |
| 3 | 2.9597 |
| 4 | 2.9597 |
| 5 | 2.9597 |
| 6 | 2.9597 |
| 7 | 2.9597 |
| 8 | 2.9597 |
| 9 | 2.9597 |
| 10 | 2.9597 |
+------+----------+
CHANGE HISTORY
EXTERNAL REFERENCES
Additional information on this topic may be found in the MariaDB Public Knowledge Base.