IT. Expert System.

MYSQL

SUM()


Description

The SUM( ) function returns the sum of expr. It returns NULL if the set has no matching rows.

This function has the form:

SELECT SUM([DISTINCT] expr)
Parameter Description
expr An expression

Return Value

Returns the sum of expr. If the return set has no rows, SUM() returns NULL. The DISTINCT keyword can be used in MySQL 5.5 to sum only the distinct values of expr.

Examples

The following example shows the basic use of this function:

ID Name Class Score
1 John Deo Four 75
2 Max Ruin Three 85
3 Arnold Three 55
4 Krish Star Four 60
5 John Mike Four 60
6 Alex John Four 55

Apply the SUM() function to the 'score' column:

SELECT sum(score) FROM 'student'
+-------------------------+
| SUM(score)              |
+-------------------------+
| 390                     |
+-------------------------+
1 row in set (0.00 sec)


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: 649 / 158798337. Delta: 0.02388 с