Home Database Mysql Tutorial PL/SQL Number数字类型函数

PL/SQL Number数字类型函数

Jun 07, 2016 pm 06:04 PM
pl/sql

PL/SQL Number数字类型函数

ABS(x) 函数,此函数用来返回一个数的绝对值。
ACOS(x)函数,返回X的反余弦值。X范围从1到-1,输入值从0到派,以弧度为单位。
ASIN(x)函数,返回X的反正弦值。X范围从1到-1,输入值从-PI/2到PI/2,以弧度为单位。
ATAN(x)函数,返回X的反正切值。输入值从-PI/2到PI/2,以弧度为单位。
BITAND(x,y)函数,返回X和Y的与结果。X和Y必须为非负整数。注意没有BITOR函数,但是在UTL_RAW包中有用 于RAW值的位操作符。
CEIL(x)函数,用来返回大于或等于X的最小整数。
COS(x)函数,返回x的余弦值。x是以弧度表示的角度。
COSH(x)函数,返回X的双曲余弦。
EXP(x)函数,与power(x,y)函数类似,不过不用指明基数,返回E的X次幂。E=2.71828183...
FLOOR(x)函数,用来返回小于或等于X的最大整数。
LN(x)函数,返回x的自然对数。x必须大于0。
LOG(x,y)函数,返回以X为底Y的对数。底必须是不为0和1的正数,Y是任意正数。
MOD(被除数,除数)求余函数,如果除数为0,则返回被除数。
POWER(x,y)函数,返回X的Y次幂。底X和指数Y都不必是正整数,但如果X是负数的话,Y必须是整数。
ROUND(x[,y])函数,返回舍入到小数点右边Y位的X值。Y缺省为0,这将X舍入为最接近的整数。如果Y是负数, 那么舍入到小数点左边相应的位上,Y必须为整数。
SIGN(x)函数,此函数用来返回一个数的正负值,若为一个正数则返回1,若为一个负数则返回-1,
若为0则仍返回0,有点像把模拟量数字化的意思。
SIN(x)函数,返回X的正弦。x是以弧度表示的角度。
SINH(x)函数,返回x的双曲正弦。
SQRT(x)函数,返回x的平方根,x不能是负数。
TAN(x)函数,返回x的正切。x是以弧度表示的角度。
TANH(x)函数,返回x的双曲正切。
TRUNC(x[,y])截取值函数,Y缺省为0,这样X被截取成一个整数。如果Y为负数,那么截取到小数点左边相应位置
WIDTH_BUCKET(x,min,max,num_buckets) 只能在SQL语句中使用。
使用WIDTH_BUCKET可以根据输入参数创建等长的段。范围MIN到MAX被分为num_buckets节,每节有相同的大小。返回X所在的那一节。如果X小于MIN,将返回0,如果X大于或等于MAX,将返回num_buckets+1.MIN和MAX
都不能为NULL,num_buckets必须是一个正整数。如果X是NULL,则返回NULL。
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

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)
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
WWE 2K25: How To Unlock Everything In MyRise
1 months ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How do you alter a table in MySQL using the ALTER TABLE statement? How do you alter a table in MySQL using the ALTER TABLE statement? Mar 19, 2025 pm 03:51 PM

The article discusses using MySQL's ALTER TABLE statement to modify tables, including adding/dropping columns, renaming tables/columns, and changing column data types.

Explain InnoDB Full-Text Search capabilities. Explain InnoDB Full-Text Search capabilities. Apr 02, 2025 pm 06:09 PM

InnoDB's full-text search capabilities are very powerful, which can significantly improve database query efficiency and ability to process large amounts of text data. 1) InnoDB implements full-text search through inverted indexing, supporting basic and advanced search queries. 2) Use MATCH and AGAINST keywords to search, support Boolean mode and phrase search. 3) Optimization methods include using word segmentation technology, periodic rebuilding of indexes and adjusting cache size to improve performance and accuracy.

How do I configure SSL/TLS encryption for MySQL connections? How do I configure SSL/TLS encryption for MySQL connections? Mar 18, 2025 pm 12:01 PM

Article discusses configuring SSL/TLS encryption for MySQL, including certificate generation and verification. Main issue is using self-signed certificates' security implications.[Character count: 159]

What are some popular MySQL GUI tools (e.g., MySQL Workbench, phpMyAdmin)? What are some popular MySQL GUI tools (e.g., MySQL Workbench, phpMyAdmin)? Mar 21, 2025 pm 06:28 PM

Article discusses popular MySQL GUI tools like MySQL Workbench and phpMyAdmin, comparing their features and suitability for beginners and advanced users.[159 characters]

How do you handle large datasets in MySQL? How do you handle large datasets in MySQL? Mar 21, 2025 pm 12:15 PM

Article discusses strategies for handling large datasets in MySQL, including partitioning, sharding, indexing, and query optimization.

How do you drop a table in MySQL using the DROP TABLE statement? How do you drop a table in MySQL using the DROP TABLE statement? Mar 19, 2025 pm 03:52 PM

The article discusses dropping tables in MySQL using the DROP TABLE statement, emphasizing precautions and risks. It highlights that the action is irreversible without backups, detailing recovery methods and potential production environment hazards.

Difference between clustered index and non-clustered index (secondary index) in InnoDB. Difference between clustered index and non-clustered index (secondary index) in InnoDB. Apr 02, 2025 pm 06:25 PM

The difference between clustered index and non-clustered index is: 1. Clustered index stores data rows in the index structure, which is suitable for querying by primary key and range. 2. The non-clustered index stores index key values ​​and pointers to data rows, and is suitable for non-primary key column queries.

How do you create indexes on JSON columns? How do you create indexes on JSON columns? Mar 21, 2025 pm 12:13 PM

The article discusses creating indexes on JSON columns in various databases like PostgreSQL, MySQL, and MongoDB to enhance query performance. It explains the syntax and benefits of indexing specific JSON paths, and lists supported database systems.

See all articles