What is the difference between SQL Server, Oracle and DB2 databases?

This article introduces the relevant knowledge of "what is the difference between SQL Server and Oracle, DB2 database". 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!

To develop database applications, it is very important to choose a good database. This paper compares SQL Server with Oracle and DB2 from some aspects to provide some reference for you to choose the database.

What are the differences between SQL Server, Oracle and DB2 databases

Openness

SQL Server

Can only run on Windows, without the slightest openness, the stability of the operating system is very important to the database. Windows9X series products focus on desktop applications, NT server is only suitable for small and medium-sized enterprises. And the reliability, security and scalability of the Windows platform are very limited. It is not as time-tested as Unix, especially when dealing with critical businesses with large amounts of data.

Oracle

Can run on all major platforms (including Windows). All industry standards are fully supported. Adopt a completely open strategy. Enables customers to choose the most appropriate solution. Full support for developers.

DBz

Can run on all major platforms (including Windows). It is most suitable for massive data. DB2 is the most widely used in the enterprise level. Among the 500 largest enterprises in the world, almost 85% use DB2 database servers, while in China, it accounted for about 5% in 1997.

Scalability, parallelism

SQL Server

The parallel implementation and coexistence model is not mature. It is difficult to deal with the increasing number of users and data volumes. Scalability is limited. Oracle parallel servers extend the capabilities of Window NT by enabling a group of nodes to share work in the same cluster, providing highly available and highly scalable cluster solutions. If the WindowsNT does not meet the needs, the user can move the database to UNIX.

DB2

DB2 has good parallelism. DB2 extends database management to a parallel, multi-node environment. A database partition is part of a database that contains its own data, indexes, configuration files, and transaction logs. Database partitions are sometimes called nodes or database nodes.

Security.

SQL server

No security certificate has been obtained.

Oracle Server

Obtain the highest certification level of ISO standard certification.

DB2

Obtain the highest certification level of ISO standard certification.

Performance.

SQL Server

Poor performance when multi-user

What are the differences between SQL Server, Oracle and DB2 databases

Oracle

The highest performance, keeping the world record for TPC-D and TPC-C under WindowsNT.

DB2

It is suitable for data warehouse and online transaction processing with high performance. Client support and application mode.

SQL Server

Cpact S structure, which only supports Windows customers, and can be connected with ADO,DAO,OLEDB,ODBC.

Oracle

Multi-level network computing, supporting a variety of industrial standards, can be connected by network customers such as ODBC,JDBC,OCI.

DB2

Cross-platform, multi-tier structure, support ODBC,JDBC and other customers.

Easy to operate

SQL Server

It is easy to operate, but only has a graphical interface.

Oracle

It is more complex, provides both GUI and command line, and operates the same under Windows NT and Unix.

DB2

The operation is simple, GUI and command line are provided at the same time, and the operation is the same under Windows NT and Unix.

Use risk

SQL Server

Completely rewritten code, after a long period of testing, is constantly delayed, and many features take time to prove. It is not very compatible with earlier products. It takes a certain risk to use it.

Oracle

Long development experience, fully backward compatible. It has been widely used. There is no risk at all.

DB2

It is widely used in giant enterprises and has good downward compatibility. The risk is small.

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