search
HomeDatabaseMysql TutorialWhat are the numeric functions in MySQL?

Number function

1. ABS(x) returns the absolute value of x

SELECT ABS(-1);
---- 返回1

2.AVG(expression) Returns the average of an expression, expression is a field
What are the numeric functions in MySQL?

SELECT AVG(age) FROM student;

What are the numeric functions in MySQL?

3, CEIL(x)/CEILING(x ) Returns the smallest integer greater than or equal to x

SELECT CEIL(1.5);
SELECT CEILING(1.5);   
---- 返回2

4, FLOOR(x) Returns the largest integer less than or equal to x

SELECT FLOOR(1.5); 
---- 返回1

5 , EXP(x) returns e raised to the power of ##7. LEAST(expr1, expr2, expr3, …) returns the minimum value in the list

SELECT EXP(3);
---- 计算 e 的三次方,返回20.085536923188
8. LN returns the natural logarithm of the number

SELECT GREATEST(3, 12, 34, 8, 25);
---- 返回以下数字列表中的最大值34
9. LOG(x) returns the natural logarithm (logarithm with base e)

SELECT LEAST(3, 12, 34, 8, 25);
---- 返回以下数字列表中的最小值3
10. MAX(expression) returns the field expression The maximum value

SELECT LN(2);
---- 返回 2 的自然对数:0.6931471805599453
11, MIN(expression) returns the maximum value in the field expression

SELECT LOG(20.085536923188);
---- 返回 3
12, POW(x,y) /POWER(x,y) returns x raised to the power of y

SELECT MAX(age) AS maxAge FROM Student;
---- age最大值
13. RAND() returns a random number from 0 to 1

SELECT MIN(age) AS minAge FROM Student;
---- age最小值
14. ROUND(x) returns the nearest integer to x

SELECT POW(2,3);
SELECT POWER(2,3);
---- 返回2 的 3 次方:8
15. SIGN(x) returns the sign of x. If x is a negative number, 0, or a positive number, it returns -1, 0 and 1

SELECT RAND();
---- 返回 0 到 1 的随机数,若()里面有数字,RAND(x),x相同时,返回值相同
16. SQRT(x) returns the square root of x

SELECT ROUND(1.23456);
---- 返回 1
17. SUM(expression) returns the sum of the specified field

SELECT SIGN(-10);
---- 返回 -1
18. TRUNCATE(x,y) returns the value x retained to y digits after the decimal point (the biggest difference from ROUND is that it will not be rounded)

SELECT SQRT(25);
---- 返回5

The above is the detailed content of What are the numeric functions in MySQL?. For more information, please follow other related articles on the PHP Chinese website!

Statement
This article is reproduced at:亿速云. If there is any infringement, please contact admin@php.cn delete
图文详解mysql架构原理图文详解mysql架构原理May 17, 2022 pm 05:54 PM

本篇文章给大家带来了关于mysql的相关知识,其中主要介绍了关于架构原理的相关内容,MySQL Server架构自顶向下大致可以分网络连接层、服务层、存储引擎层和系统文件层,下面一起来看一下,希望对大家有帮助。

mysql怎么替换换行符mysql怎么替换换行符Apr 18, 2022 pm 03:14 PM

在mysql中,可以利用char()和REPLACE()函数来替换换行符;REPLACE()函数可以用新字符串替换列中的换行符,而换行符可使用“char(13)”来表示,语法为“replace(字段名,char(13),'新字符串') ”。

mysql的msi与zip版本有什么区别mysql的msi与zip版本有什么区别May 16, 2022 pm 04:33 PM

mysql的msi与zip版本的区别:1、zip包含的安装程序是一种主动安装,而msi包含的是被installer所用的安装文件以提交请求的方式安装;2、zip是一种数据压缩和文档存储的文件格式,msi是微软格式的安装包。

mysql怎么去掉第一个字符mysql怎么去掉第一个字符May 19, 2022 am 10:21 AM

方法:1、利用right函数,语法为“update 表名 set 指定字段 = right(指定字段, length(指定字段)-1)...”;2、利用substring函数,语法为“select substring(指定字段,2)..”。

mysql怎么将varchar转换为int类型mysql怎么将varchar转换为int类型May 12, 2022 pm 04:51 PM

转换方法:1、利用cast函数,语法“select * from 表名 order by cast(字段名 as SIGNED)”;2、利用“select * from 表名 order by CONVERT(字段名,SIGNED)”语句。

MySQL复制技术之异步复制和半同步复制MySQL复制技术之异步复制和半同步复制Apr 25, 2022 pm 07:21 PM

本篇文章给大家带来了关于mysql的相关知识,其中主要介绍了关于MySQL复制技术的相关问题,包括了异步复制、半同步复制等等内容,下面一起来看一下,希望对大家有帮助。

带你把MySQL索引吃透了带你把MySQL索引吃透了Apr 22, 2022 am 11:48 AM

本篇文章给大家带来了关于mysql的相关知识,其中主要介绍了mysql高级篇的一些问题,包括了索引是什么、索引底层实现等等问题,下面一起来看一下,希望对大家有帮助。

mysql怎么判断是否是数字类型mysql怎么判断是否是数字类型May 16, 2022 am 10:09 AM

在mysql中,可以利用REGEXP运算符判断数据是否是数字类型,语法为“String REGEXP '[^0-9.]'”;该运算符是正则表达式的缩写,若数据字符中含有数字时,返回的结果是true,反之返回的结果是false。

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools