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This article introduces the knowledge of "Database: what are the advantages and disadvantages of MySQL, SQLServer and Oracle". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. MySQL

Advantages:

The software is small, fast, free and open source.

Cross platform

Because it is an open source database, the interface provided supports multi-language connection operations.

The core program of MySQL is completely multithreaded programming. And it is a lightweight process, it can provide services to users flexibly without too much system resources.

MySql has a very flexible and secure permissions and password management system. When customers connect to the MySql server, all password transfers between them are encrypted, and MySql supports host authentication

Support ODBC for Windows, support all ODBC 2.5functions and many other functions, you can use Access to connect to the MySql server, so that the application can be extended

Support for large databases, can easily support tens of millions of records of the database. As an open source database, it can be modified for different applications.

Has a very fast and stable thread-based memory allocation system that can be used continuously without having to worry about its stability

MySQL also provides a high degree of diversity, providing many different user interfaces, including command line client operations, web browsers, and a variety of programming language interfaces, such as Category Perl, Java, PHP, and Python. You can use an official client, or you can simply write an application that suits you. MySQL can be used on platforms such as Unix,Windows and OS/2, so it can be used on personal computers or servers.

Disadvantages:

Hot backup is not supported

The biggest disadvantage of MySQL is that its security system is mainly complex rather than standard, and it only changes when mysqladmin is called to reread user permissions.

There is no standard stored procedure (Stored Procedure) language, which is the biggest limitation for programmers accustomed to enterprise databases.

The price of MySQL varies with platform and installation. Linux's MySQL is free if it is installed by the user or by the system administrator rather than by a third party, while the third option must pay a license fee. Unix or linux installation is free of charge, Unix or Linux third-party installation fee.

II. SQLServer

Advantages:

Ease of use, scalability for distributed organizations, data warehouse functions for decision support, integration closely related to many other server software, good performance-to-price ratio, etc.

It brings flexibility to data management and analysis, allowing units to respond calmly in a rapidly changing environment, thus gaining competitive advantage. From a data management and analysis perspective, it is important to convert raw data into business intelligence and to take full advantage of the opportunities presented by Web. As a complete database and data analysis package, SQLServer opens the door for the rapid development of a new generation of enterprise business applications and for enterprises to win the core competitive advantage. As the record holder of the important benchmark scalability and speed award, SQLServer is a database product with full Web support, providing core support for Extensible markup language (XML) and the ability to query on Internet and outside firewalls

Disadvantages:

Openness: SQL Server can only run on windows without the slightest open operating system stability is very important to the database Windows9X series of products focus on desktop applications NT server is only suitable for small businesses and the windows platform is very limited in reliability, security and scalability, like unix, especially in dealing with large databases.

Scalable parallelism: SQL server parallel implementation and coexistence model and mature difficult to handle the growing number of users and limited scalability of data volumes.

Security: no security certificate has been obtained.

Performance: the performance is mediocre when SQL Server is multi-user.

Client support and application mode: client support and application mode. It only supports windows S mode, and the SQL Server Cpact S structure only supports windows customers to connect with ADO, DAO, OLEDB, and ODBC.

Enterprise version belongs to fee-based software.

III. Oracle

Advantages:

Openness: Oracle can run on all major platforms (including windows) to fully support all industry standards and adopt a fully open strategy to enable customers to choose suitable solutions to fully support developers.

Scalability, parallelism: oracle parallel servers provide high usability and high scalability cluster solutions by making group nodes share the same cluster work. WindowsNT can meet the needs of users to move databases. UNIXOracle parallel servers have a high degree of integration for all kinds of UNIX platform cluster mechanisms.

Security: obtain the highest certification level of ISO standard certification.

Performance: the high performance of Oracle holds the world record for TPC-D and TPC-C on open platform.

Client support and application mode: Oracle multi-level network computing supports a variety of industrial standards for ODBC, JDBC, OCI and other network customer connections.

Use risk: Oracle's long-term development experience is fully backward compatible, and the risk of wide application is low.

Disadvantages:

The requirement of hardware configuration is very high.

The price is relatively high.

Management and maintenance is troublesome.

The operation is complicated and the technical cost is high.

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