As a database administrator, you will always be exposed to a variety of similar database servers, typically SQL Server and MySQL, and of course there are others, such as Oracle. Of course, if you can kill the best, SQL Server and MySQL are very realistic, or will be different, the following small series will come to tell you what is the difference between them?
What is SQL Server?SQL Server is a relational database management system introduced by Microsoft Corporation. It is easy to use and scalable, and has a high degree of integration with related software. It can be used across multiple platforms, from laptops running Microsoft Windows 98 to large multi-processor servers running Microsoft Windows 2012.
Microsoft SQL Server is a comprehensive database platform that provides enterprise-class data management using integrated business intelligence (BI) tools. The Microsoft SQL Server Database Engine provides more secure and reliable storage for relational and structured data, enabling you to build and manage highly available and high-performance data applications for your business.
(1) Scalability: When the system needs higher database processing speed, it can be extended by simply increasing the database server.
(2) Maintainability: When a node fails, the system will automatically detect the fault and transfer the application of the faulty node to ensure the continuous operation of the database.
(3) Security: Because multiple data is synchronized on multiple servers, data set redundancy can be achieved, and multiple copies of data ensure security. In addition, it successfully put the database into the intranet, which better protects the security of the database.
(4) Ease of use: completely transparent to the application, the cluster exposed is an IP
1) It is not possible to distribute the load according to the processing power of the web server.
2) The load balancer (control terminal) failure will cause the entire database system to crash.
What is MySQL?MySQL is a relational database management system developed by MySQL AB of Sweden and currently owned by Oracle. MySQL is the most popular relational database management system. MySQL is one of the best RDBMS (RelaTIonal Database Management System) applications in WEB applications. MySQL is an associative database management system that stores data in separate tables instead of putting all the data in a large repository, which increases speed and flexibility. The SQL language used by MySQL is the most commonly used standardized language for accessing databases.
(1) A data warehouse supporting 50 million records;
(2) Adapt to all platforms;
(3) is open source software, the version update is faster;
(4) The performance is excellent. Purely in terms of performance, MySQL is quite good because it includes a default desktop format, MyISAM. The MyISAM database is very compatible with disks without taking up too much CPU and memory. MySQL can run on Windows without conflicts, and it works better on UNIX or UNIX-like systems. Some additional performance can be achieved by using a 64-bit processor. Because MySQL uses 64-bit integer processing many times internally;
(5) Cheap price
The difference between SQL Server and MySQL is mainly reflected in the following aspects. 1. The essential difference is the basic principles they follow.The narrow, conservative storage engine of the SQL server is different from the open, scalable storage engine of the MySQL server. Although you can use SQL's Sybase engine, MySQL can provide more options, such as MyISAM, Heap, InnoDB and so on. MySQL does not fully support unfamiliar keywords, so it has fewer related databases than SQL servers. At the same time, MySQL also lacks the functionality of some stored programs, such as the MyISAM engine support for switching.
Second, the issue fee: MySQL is not all free, but very cheapFor SQL Server, get a free development fee, the most common way is to buy Microsoft Office or Visual Studio. However, if you want to use it for commercial product development, you must also purchase SQL Server Standard EdiTIon. Schools or non-profit companies may not consider this additional fee.
MySQL includes a default desktop format, MyISAM. The MyISAM database is very compatible with disks without taking up too much CPU and memory. MySQL can run on Windows without conflicts, and it works better on UNIX or UNIX-like systems. SQL Server is much more stable than its competitors, but it must also add extra complexity, disk storage, memory loss, and more.
Fourth, security featuresMySQL has a binary log for changing data. Because it is binary, this log can quickly copy data from the host to the client. Even if the server crashes, the binary log will remain intact and the copied portion will not be corrupted. In the SQL server, you can also log SQL related queries, but this comes at a high price. Both products have their own complete security mechanisms. As long as you follow these security mechanisms, there will be no problems with the general program. Both use the default IP port, but sometimes it's unfortunate that these IPs are also broken into by some hackers. Of course, you can also set these IP ports yourself.
V. Recovery: Advanced SQL ServerRecovery is also a feature of MySQL, which is mainly reflected in the MyISAM configuration. This approach has its inherent shortcomings, and if you accidentally damage the database, the result may result in the loss of all data. However, it is very stable for SQL servers. The SQL server is able to monitor the data exchange point at all times and save the process of database corruption.
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