IT. Expert System.

MYSQL

AVG()


Description

The AVG( ) function returns the average value of an expression. It returns NULL if there is no matching rows.

This function has the form:

SELECT AVG(expr)
Parameter Description
expr An expression

Return Value

The average value of an expression. It returns NULL if there is no matching rows.

Examples

The following example shows the basic use of this function:

mysql> SELECT student_name, AVG(test_score)
-> FROM student
-> GROUP BY student_name;


Content

Android Reference

Java basics

Java Enterprise Edition (EE)

Java Standard Edition (SE)

SQL

HTML

PHP

CSS

Java Script

MYSQL

JQUERY

VBS

REGEX

C

C++

C#

Design patterns

RFC (standard status)

RFC (proposed standard status)

RFC (draft standard status)

RFC (informational status)

RFC (experimental status)

RFC (best current practice status)

RFC (historic status)

RFC (unknown status)

IT dictionary

License.
All information of this service is derived from the free sources and is provided solely in the form of quotations. This service provides information and interfaces solely for the familiarization (not ownership) and under the "as is" condition.
Copyright 2016 © ELTASK.COM. All rights reserved.
Site is optimized for mobile devices.
Downloads: 52 / 158779901. Delta: 0.01456 с