This article mainly talks about three important databases (MySQL, SqlServer, Oracle) and compares their advantages and disadvantages.
##1. MySQL
Advantages:
Small size, fast speed, low total cost of ownership, open source;
supports multiple operating systems;
is an open source database, and the interface provided supports connection operations in multiple languages;
The core program of MySQL adopts complete multi-threaded programming. Threads are lightweight processes that can flexibly provide services to users without excessive system resources. MySQL implemented with multi-threading and C language can easily make full use of the CPU;
MySql has a very flexible and secure permissions and password system. When a client connects to the MySql server, all password transmissions between them are encrypted, and MySql supports host authentication;
supports ODBC for Windows, supports all ODBC 2.5 functions and many other functions, can Use Access to connect to the MySql server to expand the application;
supports large databases and can easily support databases with tens of millions of records. As an open source database, it can be modified accordingly for different applications;
has a very fast and stable thread-based memory allocation system, which can be used continuously without worrying about its stability. ;
MySQL also provides a high degree of diversity and can provide many different user interfaces, including command line client operations, web browsers, and various programming language interfaces, such as C, Perl, Java, PHP, and Python. You can use a pre-packaged client, or simply write a suitable application yourself. MySQL is available for Unix, Windows, and OS/2 platforms, so it can be used on a personal computer or server.
Disadvantages:
Does not support hot backup;
The biggest disadvantage of MySQL is its security system, which is mainly complex rather than standard. In addition, it is only available to Changes occur only when mysqladmin is called to reread user permissions;
There is no stored procedure (Stored Procedure) language, which is the biggest limitation for programmers who are accustomed to enterprise-level databases;
MySQL prices vary with platform and installation method. MySQL for Linux is free if it is installed by the user himself or the system administrator rather than a third party. Third-party solutions must pay a license fee. Unix or Linux self-installation for free, Unix or Linux third-party installation for a fee.
2. SqlServer
Advantages:
Ease of use, scalability suitable for distributed organizations , data warehouse functions for decision support, close integration with many other server software, good cost performance, etc.;
brings flexibility to data management and analysis, allowing units to operate in a rapidly changing environment Respond calmly and gain a competitive advantage. From a data management and analysis perspective, it is very important to transform raw data into business intelligence and make full use of the opportunities brought by the Web. As a complete database and data analysis package, SQL Server opens the door to rapid development of a new generation of enterprise-level business applications and helps enterprises gain core competitive advantages. The record holder of important benchmark scalability and speed awards, SQL Server is a fully Web-enabled database product that provides core support for Extensible Markup Language (XML) and the ability to query over the Internet and outside the firewall. Capability;
Disadvantages:
Openness: SQL Server can only run on Windows without any openness. The stability of the operating system is very important for the database. Windows9X series products focus on the desktop. The use of NT server is only suitable for small businesses, and the reliability, security and scalability of the Windows platform are very limited, like Unix, which has been tried and tested, especially when dealing with large databases.
Scalability Parallelism: SQL server parallel implementation and coexistence model are mature and difficult to handle with increasing number of users and limited scalability of data volumes.
Security: No security certificate obtained.
Performance: SQL Server has good performance with multiple users.
Client support and application mode: Client support and application mode. Only supports C/S mode. The SQL Server C/S structure only supports Windows clients using ADO, DAO, OLEDB, and ODBC to connect.
Risks of use: SQL server completely rewrites the code and has gone through long-term testing and delays. Many functions take time to prove and are fully compatible.
3. Oracle
Advantages:
Openness: Oracle can be used on all mainstream platforms Running (including Windows) fully supports all industrial standards and adopts a completely open strategy to enable customers to choose suitable solutions and fully support developers.
Scalability, parallelism: oracle parallel server expands windownt capabilities by allowing group nodes to share the same cluster work to provide high usability and high scalability cluster solutions. windowsNT can meet the needs of users to move databases to UNIX oracle parallel The server has a high degree of integration with various UNIX platform cluster mechanisms.
Security: Certified to ISO standards at the highest certification level.
Performance: Oracle has high performance and maintains the TPC-D and TPC-C world records under the open platform.
Client support and application mode: Oracle multi-level network computing supports multiple industry standards for network client connections such as ODBC, JDBC, and OCI.
Risk of use: Oracle's long-term development experience is completely backward compatible and the risk of widespread application is low.
Disadvantages:
High requirements for hardware;
The price is relatively expensive;
Management and maintenance are more troublesome;
The operation is relatively complex and requires high technical content.
The above is about the differences between the three main databases. If you want to know more about databases, please pay attention to the database column of php Chinese website for more information!
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