What is the difference between oracle and sql?

The difference between oracle and sql: 1. Openness, oracle can run on all mainstream platforms, while sql can only run on windows; 2. Scalability and parallelism, oracle’s parallel server uses A group of nodes share work in the same cluster to expand the capabilities of windownt and provide high availability and scalability. However, the SQL parallel implementation and coexistence model are immature, difficult to handle too much data, and have limited scalability; 3. Performance , oracle has the highest performance, while sql has poor performance when there are many users, etc.

#The operating environment of this article: Windows 10 system, Oracle version 19c, DELL G3 computer.

The relational database products developed by Oracle are famous for their excellent performance. Oracle database products are used by the top 1,000 companies on the Fortune Ranking. Many large websites also choose Oracle systems. They are the best database products in the world. . In addition, Oracle Corporation develops other applications and software. At the same time, Oracle also means "oracle" in English, meaning "one who speaks for God", which refers to Oracle's development goals and determined status.

SQL (Structured Query Language) is a database language with multiple functions such as data manipulation and data definition. This language has interactive characteristics and can provide users with great convenience. The database management system should make full use of it. SQL language improves the work quality and efficiency of computer application systems. The SQL language can not only be used independently in terminals, but can also be used as a sub-language to effectively assist other programming. In this program application, SQL can work with other programming languages ​​to optimize program functions, thereby providing users with more and more comprehensive information. [1]

The SQL Server database includes two sub-databases, Microsoft SQL Server and Sybase SQL Server. Whether the database can operate normally is directly related to the operation security of the entire computer system.

The difference between oracle and sql

1. Openness

SQL Server can only run on windows, there is no The openness and stability of the operating system are very important to the database. Windows9X series products focus on desktop applications, and NT server is only suitable for small and medium-sized enterprises. Moreover, the reliability, security and scalability of the Windows platform are very limited. It is not as proven as Unix, especially when dealing with large databases.

Oracle can run on all major platforms (including windows). Fully supports all industry standards. Adopt a completely open strategy. This enables customers to choose the most suitable solution. Full support to developers.

2. Scalability, parallelism

SQL server parallel implementation and coexistence model are not mature, and it is difficult to handle the increasing number of users and data volumes, and scaling Sex is limited.

Oracle Parallel Server extends the capabilities of windownt by enabling a group of nodes to share work in the same cluster, providing high availability and high scalability cluster solutions. If windowsNT cannot meet the needs, users can move the database to UNIX. Oracle's parallel server has a high degree of integration with the cluster mechanisms of various UNIX platforms.

3. Performance

SQL Server has poor performance with multiple users.

Oracle has the highest performance and maintains the world record of TPC-D and TPC-C under the open platform.

4. Client support and application mode

SQL Server C/S structure only supports windows clients and can be connected using ADO, DAO, OLEDB, and ODBC.

Oracle multi-level network computing supports multiple industrial standards and can be connected with network clients such as ODBC, JDBC, and OCI.

5. Operation

SQL Server is simple to operate, but only has a graphical interface.

Oracle is more complex, providing both GUI and command line, and the operation is the same under windowsNT and unix.

6. Risks of use

SQL server is a completely rewritten code that has gone through long-term testing and continuous delays. Many functions take time to prove. Not very compatible.

Oracle has long-term development experience and is fully backward compatible. Be widely used. There is no risk at all. In the final price, ORACLE is more expensive than SQLSRVER.

Extended reading

What are the advantages and disadvantages of Oracle database and Sql server database

1. Oracle is cross-platform, SQL Server can only run on Windows, and Windows can be installed The hardware is limited. For example, Sun's Sparc server cannot install Windows, and some mainframes and minicomputers can only install UNIX. On these high-end machines, you can only run Oracle. This is destined to be a high-end database, and what about SQL Server? ,mid lower end.

2. Oracle has truly implemented row-level locking, and SQL Server also claims to have implemented row-level locking. But if you actually try it, it won't work without adding an index.

3. Because of Oracle's multi-version data technology, read and write operations will not wait for each other. Although SQLServer2005 learned from Oracle and added a snapshot mechanism, thus also introducing multi-version data (MySQL also has a multi-version data mechanism, which cannot It must be learning Oracle), but the actual effect is that there are two versions of data. When the isolation level is readcommitted, reading and writing no longer wait for each other, but setting the isolation to Serializable will still cause reading and writing to wait for each other.

4. Oracle's transaction log archiving is very convenient, but SQL Server needs to use transaction log backup to implement it, and it also needs to configure automatic jobs and start the agent service.

5. Oracle's rich data dictionary makes it easy for DBAs to judge various situations in the database. Although SQLServer2005 has learned the characteristics of Oracle's data dictionary, there is still a big difference in quantity and convenience. Personally, I feel this is the most user-friendly part of Oracle.

6. Oracle's PL/SQL is much more powerful than SQLServer's T-SQL.

7. Oracle has more types of triggers than SQLServer.

8. Oracle's backup and recovery principle is quite simple and clear. For backup, just copy the data file on the operating system. For recovery, copy it back again. Don't worry, the data is old. Just apply the redo log. As for SQL Server, although the principle is still the same in essence, it is much more troublesome to operate, so troublesome that you cannot realize its essence.

9. Oracle database startup can have multiple stages, so that DBA can solve some special problems by starting to a specific stage under different circumstances. However, as long as the SQL Server service is started, all databases will be opened. .

10. SQL Server feels simple and easy to use, but I have to say that if you continue to move forward, you will find that the architecture of SQL Server is quite complex (note that I say complex here) , it generally follows the architecture of Sybase. It is estimated that it is difficult to make fundamental changes to this complex structure. As for Oracle, the longer you go, the more you will feel that its architecture is rigorous, although it will be difficult at first. One of my metaphors is that SQL Server is like a point-and-shoot camera (those small digital cameras with one or two thousand dollars), and Oracle is like a SLR camera (40D, 5D, D300). If you are a beginner, then use a point-and-shoot camera. In various environments It's basically passable when shooting at low speed. With a SLR, you have to set the aperture and shutter yourself, but the effect is not as good as a point-and-shoot camera. If you are an expert, it will be difficult to use the point-and-shoot camera.

11. Oracle books are generally relatively in-depth, and there are a large number of them at random, such as Epert Oracle, Practical Oracle 8i, Cost-based Oracle, and SQL Server. I’m afraid there is only the Inside SQL Server. Although SQL There are many more books on Server than on Oracle (especially in China), but most of them are step by step introductory books.

12. Comparing SQL*Plus and sqlcmd (or 2000's osql, 6.5's isql), the function of sqlcmd is too crude and far different.

13. The biggest advantage of SQL Server is that it is closely integrated with Windows and easy to use. However, it should be noted that everything has two sides. These advantages may lead to its fatal shortcomings, such as ease of use, which makes people who work on SQL Server Not asking for a thorough understanding is okay sometimes, but sometimes not asking for a thorough understanding may cause disaster, especially for those who work on databases. Sorry, I was originally talking about the advantages of SQL Server, but in the end it became a disadvantage.

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