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MySQL | STDDEV_SAMP method

schedule Aug 10, 2023
Last updated
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MySQL's STDDEV_SAMP(~) aggregate method returns the sample standard deviation from the provided numeric input.

Parameters

1. expr | numeric

The numeric input to return the sample standard deviation for.

Return value

The sample standard deviation for the provided numeric input.

Examples

Consider the following table about some students:

student_id

fname

lname

day_enrolled

age

username

1

Sky

Towner

2015-12-03

17

stowner1

2

Ben

Davis

2016-04-20

19

bdavis2

3

Travis

Apple

2018-08-14

18

tapple3

4

Arthur

David

2016-04-01

16

adavid4

5

Benjamin

Town

2014-01-01

17

btown5

The above sample table can be created using the code here.

Basic usage

To return the sample standard deviation of students' age:

SELECT STDDEV_SAMP(age) AS "Sample Standard Deviation Age"
FROM students;
+-------------------------------+
| Sample Standard Deviation Age |
+-------------------------------+
| 1.1401754250991378 |
+-------------------------------+
robocat
Published by Arthur Yanagisawa
Edited by 0 others
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