http://www.mysqlops.com/2013/04/09/dba-which-product.html 2013-4-9 真正的喜好或说兴趣,是推动人不断进步的最大内驱动力,会促使你不知疲倦地努力学习和工作。 1)基础知识 不管你选择哪种数据库产品,有些基础理论知识必须扎实,尤其是,数据库系统概
http://www.mysqlops.com/2013/04/09/dba-which-product.html
2013-4-9
真正的喜好或说兴趣,是推动人不断进步的最大内驱动力,会促使你不知疲倦地努力学习和工作。
1)基础知识
不管你选择哪种数据库产品,有些基础理论知识必须扎实,尤其是,数据库系统概论、Linux 操作系统、SQL 标准语言、数据结构(重点排序算法)、开发语言(至少懂几款脚本语言,Shell 必须要会。再就是最好能再掌握一种脚本语言,例如 PHP、Python、Perl、Ruby等都可以)。
2)产品选择优先顺序
选择一款就业面较广的数据库产品,前三款 Oracle、MySQL、SQL Server,其次是 PostgreSQL、DB2、Sybase、Teradata 等。
3)慎重选择 SQL Server 数据库,现在的版本只能运行在 Windows 系统下(注:SQL Server 2000 或称 8.0.X 及之前版本是有办法在 Linux 系统环境的),会导致多数互联网企业不会用,早期的使用者都积极转型,即使传统行业也都在想办法转型,比如消费品的百胜。
4)第一条是给出的理论建议,第二、三是从就业前景,第四条非常重要,甚至可以颠覆第二、第三条,也即你喜欢那款数据库产品,这就跟你是白富美,硬是看上穷二代,谁也左右不了你。
5)学习难度
- Oracle 、DB2、Sybase、PostgreSQL 四种数据库产品相对而言复杂度要更高,产品的功能也更加丰富。
- SQL Server 功能非常丰富,图形化界面非常友好,这是微软产品的优势,所以上手容易。大学一般也会选择为教学产品,且操作系统也是大家熟悉的图形化界面。
- MySQL 是一款看似容易,谁都会使用,但却是比较可怕的产品,真正要掌握不容易,不过此产品占据互联网可能达到 80% 以上使用率(注:不是精确数据,从个人掌握的信息给出的估算)。
6)竞争和薪酬
- DB2、Sybase 使用范围不大,主要是通信、金融行业为主,掌握的技术人员少,竞争相对少,数据非常重要,且多数使用中高档存储设备,故 DBA 也非常值钱。
- Oracle 占据金融、通信、传统企业、互联网等非常大的市场,最新数据大陆使用率超过 53%,可见这个市场有多大,存储的数据也非常重要,故 DBA 薪资也可观,但是 Oracle DBA 很难超越中期一批成长的人员,故薪资多少还是受限,外加其制约企业的成本。当然通信、金融行业的薪资会高于互联网行业 Oracle DBA 薪资;
- PostgreSQL 国内占有率不高,但非常有挑战性和巨大的发展潜力,个人认为是下个“金矿”,技术人员也不多,国内主要是斯凯在用,早期去哪儿、Yahoo 中国等,后改为 MySQL。
- MySQL 非常广,从业者越来越多,但是并没有达到高峰期,3年前本来个人预计2014年发展成熟,但遗憾的是波折不断,导致我的预判不准确,搞不好还需要3至4年才能成熟,MySQL DBA 若不涉及业务、架构或源代码的研究,薪资待遇很难上去,最高薪资我并不清楚多少,但是市场上3万月薪以上者不少。
2013年4月全球数据库排名 Oracle排名居首。DB-Engines 2013年 4 月份最新的数据库排名显示,MySQL 上升迅速,目前已经超过微软的 SQL Server 排在第二位,下表是前 107名详细的排名数据:
目前 MySQL DBA 行业发展特点,
- 从业者越来越多了,但平均或总体技术水平越来越低。
- 能用 MySQL 思想做事情的合格 DBA 人数并未增加。
- 随着年龄增长,早期 80% 以上 DBA 都退出了一线。
- 市场占有率越来越高,高技能或综合素质高的 DBA 人数却逐年减少趋势。
- 值得庆幸的是,研究源码的人越来越多,能力也越来越强。

InnoDBBufferPool reduces disk I/O by caching data and indexing pages, improving database performance. Its working principle includes: 1. Data reading: Read data from BufferPool; 2. Data writing: After modifying the data, write to BufferPool and refresh it to disk regularly; 3. Cache management: Use the LRU algorithm to manage cache pages; 4. Reading mechanism: Load adjacent data pages in advance. By sizing the BufferPool and using multiple instances, database performance can be optimized.

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

MySQL is worth learning because it is a powerful open source database management system suitable for data storage, management and analysis. 1) MySQL is a relational database that uses SQL to operate data and is suitable for structured data management. 2) The SQL language is the key to interacting with MySQL and supports CRUD operations. 3) The working principle of MySQL includes client/server architecture, storage engine and query optimizer. 4) Basic usage includes creating databases and tables, and advanced usage involves joining tables using JOIN. 5) Common errors include syntax errors and permission issues, and debugging skills include checking syntax and using EXPLAIN commands. 6) Performance optimization involves the use of indexes, optimization of SQL statements and regular maintenance of databases.

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA


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

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.

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),

Dreamweaver CS6
Visual web development 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

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment