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# MySQL | VAR_SAMP method

schedule Aug 12, 2023
Last updated
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MySQL
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MySQL's VAR_SAMP(~) aggregate method returns the sample standard variance from the provided numeric input.

# Parameters

1. expr | numeric

The numeric expression to return the sample standard variance for.

# Return value

The sample standard variance from the provided numeric input.

# Examples

Consider the following table about some students:

student_id

fname

lname

day_enrolled

age

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

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 variance of students' age:

SELECT VAR_SAMP(age) AS "Sample Standard Variance Age"
FROM students;
+------------------------------+
| Sample Standard Variance Age |
+------------------------------+
| 1.2999999999999998 |
+------------------------------+
Edited by 0 others
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