search
HomeDatabaseMysql Tutorial带你完全认识MySQL数据库中Show命令用法_MySQL

 

MySQL中有很多的基本命令,show命令也是其中之一,在很多使用者中对show命令的使用还容易产生混淆,本文汇集了show命令的众多用法。

a. show tables或show tables from database_name; -- 显示当前数据库中所有表的名称。

 

b. show databases; -- 显示mysql中所有数据库的名称。

 

c. show columns from table_name from database_name; 或show columns from database_name.table_name; -- 显示表中列名称。

 

d. show grants for user_name; -- 显示一个用户的权限,显示结果类似于grant 命令。

 

e. show index from table_name; -- 显示表的索引。

 

f. show status; -- 显示一些系统特定资源的信息,例如,正在运行的线程数量。

 

g. show variables; -- 显示系统变量的名称和值。

 

h. show processlist; -- 显示系统中正在运行的所有进程,也就是当前正在执行的查询。大多数用户可以查看他们自己的进程,但是如果他们拥有process权限,就可以查看所有人的进程,包括密码。

 

i. show table status; -- 显示当前使用或者指定的database中的每个表的信息。信息包括表类型和表的最新更新时间。

 

j. show privileges; -- 显示服务器所支持的不同权限。

 

k. show create database database_name; -- 显示create database 语句是否能够创建指定的数据库。

 

l. show create table table_name; -- 显示create database 语句是否能够创建指定的数据库。

 

m. show engies; -- 显示安装以后可用的存储引擎和默认引擎。

 

n. show innodb status; -- 显示innoDB存储引擎的状态。

 

o. show logs; -- 显示BDB存储引擎的日志。

 

p. show warnings; -- 显示最后一个执行的语句所产生的错误、警告和通知。

 

q. show errors; -- 只显示最后一个执行语句所产生的错误。

 

r. show [storage] engines; --显示安装后的可用存储引擎和默认引擎。

Statement
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
Adding Users to MySQL: The Complete TutorialAdding Users to MySQL: The Complete TutorialMay 12, 2025 am 12:14 AM

Mastering the method of adding MySQL users is crucial for database administrators and developers because it ensures the security and access control of the database. 1) Create a new user using the CREATEUSER command, 2) Assign permissions through the GRANT command, 3) Use FLUSHPRIVILEGES to ensure permissions take effect, 4) Regularly audit and clean user accounts to maintain performance and security.

Mastering MySQL String Data Types: VARCHAR vs. TEXT vs. CHARMastering MySQL String Data Types: VARCHAR vs. TEXT vs. CHARMay 12, 2025 am 12:12 AM

ChooseCHARforfixed-lengthdata,VARCHARforvariable-lengthdata,andTEXTforlargetextfields.1)CHARisefficientforconsistent-lengthdatalikecodes.2)VARCHARsuitsvariable-lengthdatalikenames,balancingflexibilityandperformance.3)TEXTisidealforlargetextslikeartic

MySQL: String Data Types and Indexing: Best PracticesMySQL: String Data Types and Indexing: Best PracticesMay 12, 2025 am 12:11 AM

Best practices for handling string data types and indexes in MySQL include: 1) Selecting the appropriate string type, such as CHAR for fixed length, VARCHAR for variable length, and TEXT for large text; 2) Be cautious in indexing, avoid over-indexing, and create indexes for common queries; 3) Use prefix indexes and full-text indexes to optimize long string searches; 4) Regularly monitor and optimize indexes to keep indexes small and efficient. Through these methods, we can balance read and write performance and improve database efficiency.

MySQL: How to Add a User RemotelyMySQL: How to Add a User RemotelyMay 12, 2025 am 12:10 AM

ToaddauserremotelytoMySQL,followthesesteps:1)ConnecttoMySQLasroot,2)Createanewuserwithremoteaccess,3)Grantnecessaryprivileges,and4)Flushprivileges.BecautiousofsecurityrisksbylimitingprivilegesandaccesstospecificIPs,ensuringstrongpasswords,andmonitori

The Ultimate Guide to MySQL String Data Types: Efficient Data StorageThe Ultimate Guide to MySQL String Data Types: Efficient Data StorageMay 12, 2025 am 12:05 AM

TostorestringsefficientlyinMySQL,choosetherightdatatypebasedonyourneeds:1)UseCHARforfixed-lengthstringslikecountrycodes.2)UseVARCHARforvariable-lengthstringslikenames.3)UseTEXTforlong-formtextcontent.4)UseBLOBforbinarydatalikeimages.Considerstorageov

MySQL BLOB vs. TEXT: Choosing the Right Data Type for Large ObjectsMySQL BLOB vs. TEXT: Choosing the Right Data Type for Large ObjectsMay 11, 2025 am 12:13 AM

When selecting MySQL's BLOB and TEXT data types, BLOB is suitable for storing binary data, and TEXT is suitable for storing text data. 1) BLOB is suitable for binary data such as pictures and audio, 2) TEXT is suitable for text data such as articles and comments. When choosing, data properties and performance optimization must be considered.

MySQL: Should I use root user for my product?MySQL: Should I use root user for my product?May 11, 2025 am 12:11 AM

No,youshouldnotusetherootuserinMySQLforyourproduct.Instead,createspecificuserswithlimitedprivilegestoenhancesecurityandperformance:1)Createanewuserwithastrongpassword,2)Grantonlynecessarypermissionstothisuser,3)Regularlyreviewandupdateuserpermissions

MySQL String Data Types Explained: Choosing the Right Type for Your DataMySQL String Data Types Explained: Choosing the Right Type for Your DataMay 11, 2025 am 12:10 AM

MySQLstringdatatypesshouldbechosenbasedondatacharacteristicsandusecases:1)UseCHARforfixed-lengthstringslikecountrycodes.2)UseVARCHARforvariable-lengthstringslikenames.3)UseBINARYorVARBINARYforbinarydatalikecryptographickeys.4)UseBLOBorTEXTforlargeuns

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

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

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.

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft