Mysql basic data types include integer types, floating point types, string types, date and time types, Boolean types, etc. Detailed introduction: 1. Integer type, which provides a variety of integer types, occupying 1, 2, 3, 4 and 8 bytes respectively, and can store integer values in different ranges; 2. Floating point type, supports two floating point types. FLOAT and DOUBLE are used to store single-precision and double-precision floating-point numbers respectively; 3. String type provides a variety of string types, which can store strings of different lengths and binary data, etc.
# Operating system for this tutorial: Windows 10 system, Dell G3 computer.
MySQL is a popular relational database management system that supports multiple data types. Basic data types include integers, floating point numbers, strings, dates and times, Boolean values, etc. The basic data types of MySQL will be introduced in detail below.
Integer types
MySQL provides a variety of integer types, including TINYINT, SMALLINT, MEDIUMINT, INT and BIGINT. They occupy 1, 2, 3, 4 and 8 bytes respectively and can store different ranges of integer values. For example, TINYINT can store integers in the range -128 to 127, while BIGINT can store integers in the range -9223372036854775808 to 9223372036854775807.
Floating point type
MySQL supports two floating point types: FLOAT and DOUBLE. They are used to store single-precision and double-precision floating point numbers respectively. FLOAT occupies 4 bytes and can store floating point numbers with approximately 7 digits of precision, while DOUBLE occupies 8 bytes and can store floating point numbers with approximately 15 digits of precision.
String type
MySQL provides a variety of string types, including CHAR, VARCHAR, BINARY, VARBINARY, TEXT and BLOB. Among them, CHAR and VARCHAR are used to store fixed-length and variable-length strings, BINARY and VARBINARY are used to store fixed-length and variable-length binary data, and TEXT and BLOB are used to store large text and binary data. These string types can store string and binary data of varying lengths.
Date and time types
MySQL supports multiple date and time types, including DATE, TIME, DATETIME, and TIMESTAMP. These types are used to store date and time information and can represent date and time values of varying precision. For example, DATE is used to store date values, TIME is used to store time values, DATETIME is used to store date and time values, and TIMESTAMP is used to store timestamp values.
Boolean type
In MySQL, the Boolean type is represented by TINYINT(1), which can store Boolean values true and false. TINYINT(1) is actually an integer type, but can be used to represent Boolean values, where 1 represents true and 0 represents false.
In addition to the above basic data types, MySQL also supports other data types, such as enumeration types, collection types, geometry types, etc. Enumeration types are used to store enumeration values, collection types are used to store collections of multiple enumeration values, and geometry types are used to store geometric data. These data types can meet different data storage needs.
In short, MySQL’s basic data types include integer types, floating point types, string types, date and time types, Boolean types, etc. These data types can meet various data storage and processing needs and are an important part of the MySQL database.
The above is the detailed content of What are the basic data types of mysql?. For more information, please follow other related articles on the PHP Chinese website!

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。

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。

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)..”。

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。

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。

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。

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。

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

Atom editor mac version download
The most popular open source editor

Dreamweaver Mac version
Visual web development tools

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
