今天的这篇文章用来讨论如何解决导入mysql大数据文件的问题,其实说的简单了就是一条SQL语句,而如果你是一名SQL高手,那完全可以略过此文。
对于经常使用MYSQL的人来说,phpmyadmin是一个必备的工具。这个工具非常强大,几乎可以完成所有的数据库操作,但是它也有一个弱点,对于往远程服务器上导入较大的数据文件的时候会速度奇慢,甚至出现长期没有响应的情况。
为什么会出现这样的情况呢?当我们选择一个sql数据文件并提交的时候,服务器首先要先把文件上传到服务器,然后才会执行导入代码把数据导入到数据库。我们知道phpmyadmin是通过web方式上传的数据文件,而web方式上传是很不稳定的,尤其是网速慢的时候,这就是为什么我们会有那么多次在电脑前面苦苦等待而最终却没有结果的原因。
通过上面的分析,我们知道这个问题是出在web上传而非导入程序,所以如果能避免通过web上传这个问题就好办了。我们可能会想到那功能强大的ftp上传工具,可是phpmyadmin无法选择远程路服务器上的文件,这是很郁闷的。
这里我们要放弃phpmysqladmin,通过mysql语句来导入数据库。很多人会纳闷怎么来执行SQL语句,这是一个关键的问题,这需要你的空间支持SSH(Secure Shell Protocol),并且你还得会一些linux命令。
首先通过SSH登录到服务器(我用putty登录工具),通过一些简单的linux命令找到我们的sql文件,然后运行下面的代码:
mysql db_name
执行完命令之后如果没有任何提示,则说明我们的数据已经导入成功了(注意文件格式是date_file.sql, sql.gz在中文下会出错) 。
这是一个很好的办法,但是也不是所有的人都可以用这个方法的,因为前提是你的空间必须支持SSH登录,而支持SSH登录的空间还是比较少的,这真是挺让人遗憾的。
还有一个办法就是把phpmyadmin里面的import那个功能模块提取出来,稍微改动一下也可以达到相同的效果。当然如果你是一个PHP高手,也可以自己写一个导入的程序,可以直接选择一个服务器的路径,期待ing

MySQLstringtypesimpactstorageandperformanceasfollows:1)CHARisfixed-length,alwaysusingthesamestoragespace,whichcanbefasterbutlessspace-efficient.2)VARCHARisvariable-length,morespace-efficientbutpotentiallyslower.3)TEXTisforlargetext,storedoutsiderows,

MySQLstringtypesincludeVARCHAR,TEXT,CHAR,ENUM,andSET.1)VARCHARisversatileforvariable-lengthstringsuptoaspecifiedlimit.2)TEXTisidealforlargetextstoragewithoutadefinedlength.3)CHARisfixed-length,suitableforconsistentdatalikecodes.4)ENUMenforcesdatainte

MySQLoffersvariousstringdatatypes:1)CHARforfixed-lengthstrings,2)VARCHARforvariable-lengthtext,3)BINARYandVARBINARYforbinarydata,4)BLOBandTEXTforlargedata,and5)ENUMandSETforcontrolledinput.Eachtypehasspecificusesandperformancecharacteristics,sochoose

TograntpermissionstonewMySQLusers,followthesesteps:1)AccessMySQLasauserwithsufficientprivileges,2)CreateanewuserwiththeCREATEUSERcommand,3)UsetheGRANTcommandtospecifypermissionslikeSELECT,INSERT,UPDATE,orALLPRIVILEGESonspecificdatabasesortables,and4)

ToaddusersinMySQLeffectivelyandsecurely,followthesesteps:1)UsetheCREATEUSERstatementtoaddanewuser,specifyingthehostandastrongpassword.2)GrantnecessaryprivilegesusingtheGRANTstatement,adheringtotheprincipleofleastprivilege.3)Implementsecuritymeasuresl

ToaddanewuserwithcomplexpermissionsinMySQL,followthesesteps:1)CreatetheuserwithCREATEUSER'newuser'@'localhost'IDENTIFIEDBY'password';.2)Grantreadaccesstoalltablesin'mydatabase'withGRANTSELECTONmydatabase.TO'newuser'@'localhost';.3)Grantwriteaccessto'

The string data types in MySQL include CHAR, VARCHAR, BINARY, VARBINARY, BLOB, and TEXT. The collations determine the comparison and sorting of strings. 1.CHAR is suitable for fixed-length strings, VARCHAR is suitable for variable-length strings. 2.BINARY and VARBINARY are used for binary data, and BLOB and TEXT are used for large object data. 3. Sorting rules such as utf8mb4_unicode_ci ignores upper and lower case and is suitable for user names; utf8mb4_bin is case sensitive and is suitable for fields that require precise comparison.

The best MySQLVARCHAR column length selection should be based on data analysis, consider future growth, evaluate performance impacts, and character set requirements. 1) Analyze the data to determine typical lengths; 2) Reserve future expansion space; 3) Pay attention to the impact of large lengths on performance; 4) Consider the impact of character sets on storage. Through these steps, the efficiency and scalability of the database can be optimized.


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

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

Hot Article

Hot Tools

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

Zend Studio 13.0.1
Powerful PHP integrated development environment

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.

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

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
