STDDEV_SAMP()

USAGE

DETAILS

SYNONYMS

SCHEMA

PARAMETERS

SKYSQL

PRIVILEGES

EXAMPLES

CREATE TABLE t (a INT, b INT);
INSERT INTO t 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 STDDEV_SAMP(a), STDDEV_SAMP(b) FROM t;
+----------------+----------------+
| STDDEV_SAMP(a) | STDDEV_SAMP(b) |
+----------------+----------------+
|         2.9681 |         2.7740 |
+----------------+----------------+

As Window Function

SELECT a, STDDEV_SAMP(a) OVER (PARTITION BY b) AS stdev_samp_a
FROM t ORDER BY a, stdev_samp_a;
+------+--------------+
| a    | stdev_samp_a |
+------+--------------+
|    1 |         NULL |
|    1 |       4.1633 |
|    2 |       2.1213 |
|    3 |       0.0000 |
|    3 |       0.0000 |
|    4 |         NULL |
|    5 |         NULL |
|    5 |       2.1213 |
|    6 |         NULL |
|    7 |       0.7071 |
|    7 |       4.1633 |
|    8 |       0.7071 |
|    9 |         NULL |
|    9 |       4.1633 |
|   10 |         NULL |
+------+--------------+

ERROR HANDLING

FEATURE INTERACTION

RESPONSES

DIAGNOSIS

ISO 9075:2016

CHANGE HISTORY

Release Series

History

11.4 Enterprise

  • Not present.

10.6 Enterprise

  • Present starting in MariaDB Enterprise Server 10.6.4-1.

10.6 Community

  • Present starting in MariaDB Community Server 10.6.0.

10.5 Enterprise

  • Present starting in MariaDB Enterprise Server 10.5.3-1.

10.5 Community

  • Present starting in MariaDB Community Server 10.5.0.

10.4 Enterprise

  • Present starting in MariaDB Enterprise Server 10.4.6-1.

10.4 Community

  • Present starting in MariaDB Community Server 10.4.0.

10.3 Enterprise

  • Present starting in MariaDB Enterprise Server 10.3.16-1.

10.3 Community

  • Present starting in MariaDB Community Server 10.3.0.

10.2 Enterprise

  • Present starting in MariaDB Enterprise Server 10.2.25-1.

10.2 Community

  • Present starting in MariaDB Community Server 10.2.0.

Release Series

History

11.4 Enterprise

  • Not present.

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