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MySQL | STDDEV method

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schedule Mar 9, 2022
Last updated
local_offer MySQL
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MySQL's STDDEV(~) aggregate method returns the population standard deviation from the provided numeric input.

Parameters

1. expr | numeric

The numeric input to return the population standard deviation for.

Return value

The population 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 population standard deviation of students' age:

SELECT STDDEV(age) AS "Standard Deviation Age"
FROM students;
+------------------------+
| Standard Deviation Age |
+------------------------+
| 1.0198039027185568 |
+------------------------+
robocat
Published by Arthur Yanagisawa
Edited by 0 others
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