MySQL Tutorials - Herong's Tutorial Examples - Version 4.20, by Dr. Herong Yang
Numeric Functions
This section describes some commonly used numeric functions like, ABS(), CEILING(), COS(), PI(), RANDOM(), ROUND(), and TRUNCATE().
"ABS(number)" - Returns the absolute value of the specified number.
"CEILING(number)" - Returns the smallest integer value not less than the specified number.
"COS(number)" - Returns the cosine of the specified number.
"PI()" - Returns the value of PI, 3.141592653589793116.
"EXP(number)" - Returns the value of e raise to the power of the specified number.
"FLOOR(number)" - Returns the largest integer value not greater than the specified number.
"GREATEST(list)" - Returns the largest value of the specified list of values.
"LEAST(list)" - Returns the smallest value of the specified list of values.
"RAND()" - Returns a random number between 0 and 1.
"ROUND(number)" - Returns the nearest integer of the specified number.
"ROUND(number, position)" - Returns the rounded value of the specified number at the specified decimal position.
"SIGN(number)" - Returns -1, 0 or 1 if the specified number is negative, zero or positive.
"TRUNCATE(number, position)" - Returns the truncated value of the specified number at the specified decimal position.
Examples of numeric functions, NumericFunctions.sql:
-- NumericFunctions.sql -- Copyright (c) 2015, HerongYang.com, All Rights Reserved. -- SELECT PI(); SELECT CEILING(PI()); SELECT FLOOR(PI()); SELECT ROUND(PI(),4); SELECT TRUNCATE(PI(),4);
Output:
PI() 3.141593 CEILING(PI()) 4 FLOOR(PI()) 3 ROUND(PI(),4) 3.1416 TRUNCATE(PI(),4) 3.1415
Last update: 2015.
Table of Contents
MySQL Introduction and Installation
Introduction of MySQL Programs
Perl Programs and MySQL Servers
PHP Programs and MySQL Servers
Java Programs and MySQL Servers
Character Strings and Bit Strings
Table Column Types for Different Types of Values
Using DDL to Create Tables and Indexes
Using DML to Insert, Update and Delete Records
Using SELECT to Query Database
Transaction Management and Isolation Levels
Defining and Calling Stored Procedures