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- Interpretation of differences between Oracle11g and Oracle12c versions
- Oracle Database has always been one of the leaders in enterprise-level database management systems, and its continuously updated and iterative versions have also attracted widespread attention. Among them, Oracle11g and Oracle12c versions are relatively representative versions and have many differences. This article will explain some important differences between Oracle11g and Oracle12c, and attach specific code examples to help readers gain a deeper understanding of the differences between the two versions. 1. Architecture differences Oracle1
- Linux Operation and Maintenance 819 2024-03-07 14:30:05
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- Detailed explanation of the management method of read-only permissions on Oracle tables
- Detailed explanation of the management method of read-only permissions on Oracle tables In Oracle database, it is very important to manage read-only permissions on tables, which can effectively protect the integrity and security of the data. This article will introduce in detail how to manage read-only permissions on tables in Oracle database and provide specific code examples. 1. Grant read-only permission to the user. Use the GRANT statement to grant read-only permission to the user: GRANTSELECTONtable_nameTOuser_name; Example:
- Linux Operation and Maintenance 674 2024-03-07 12:12:04
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- Detailed explanation of Oracle query table lock status method
- Detailed explanation of Oracle query table lock status method In database operations, table lock is a very important concept, it will affect the performance and concurrency of the database. This article will introduce in detail the method of querying table lock status in Oracle database and give specific code examples. 1. Method of querying table lock status In Oracle database, we can obtain table lock status information by querying in the system view. The following are some commonly used system views: V$LOCK: View DBA_BL that displays advanced lock information in the database
- Linux Operation and Maintenance 734 2024-03-07 11:36:03
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- Detailed explanation of new features of Oracle11g and Oracle12c
- As the world's leading database management system, Oracle is constantly updated and upgraded to adapt to changing needs. In this article, I will introduce the new features of Oracle11g and Oracle12c in detail, and provide specific code examples to help readers better understand. Detailed explanation of the new features of Oracle11g Automatic tuning function Oracle11g introduces an automatic tuning function, which can improve system performance by analyzing database performance and automatically performing necessary adjustments. Below is a simple code example,
- Linux Operation and Maintenance 940 2024-03-07 10:48:04
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- Oracle time format adjustment tutorial
- Oracle time format adjustment tutorial In Oracle database, time format adjustment is a very common operation, especially in the process of data query, display and processing. This article will introduce how to adjust the time format in the Oracle database and provide specific code examples, hoping to help readers better understand and apply the time format adjustment operation. 1. TO_DATE function The TO_DATE function in Oracle database is used to convert character date data into date data. Its basic syntax is:
- Linux Operation and Maintenance 583 2024-03-07 10:30:05
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- Comparison of database management functions between Oracle11g and Oracle12c
- Oracle is a world-famous relational database management system, and its different versions provide different functions and performance optimization. This article will compare the database management functions of Oracle11g and Oracle12c, and provide some specific code examples to illustrate their differences. 1. Comparison of storage management functions 1.1 Data file management In Oracle11g, we need to manually add and expand the size of data files, for example: ALTERDATABASEDATAFILE
- Linux Operation and Maintenance 1166 2024-03-07 10:12:05
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- Practical tips for querying table lock status in Oracle
- Oracle is a powerful relational database management system that provides rich functions and flexible query language. In the daily development and operation and maintenance process, we often encounter the need to query table lock status. This article will introduce how to use Oracle's system view to query table lock status, and give specific code examples. In Oracle, table locks are an important mechanism used to control concurrent access. When a session updates a table, the system automatically locks the table to prevent other sessions from concurrently updating the same row.
- Linux Operation and Maintenance 1053 2024-03-07 09:27:04
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- Strategies for dealing with exceptions in Oracle listening servers
- Oracle database is a leader among enterprise-level database systems, and its stability and performance have always been recognized by the industry. Oracle listening server (Listener) plays a vital role as the interactive link between Oracle database and client applications. However, sometimes exceptions may occur in the Listener, which may cause the database to be unable to connect normally and have a serious impact on the business system. Therefore, the response strategy for Oracle monitoring server exceptions is crucial. one
- Linux Operation and Maintenance 779 2024-03-07 09:00:12
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- Several ways to query table lock status in Oracle
- Title: Several ways to query table lock status in Oracle. In Oracle database, table lock is an important database lock, used to control concurrent access to database tables. When multiple users access the same table at the same time, table locks may occur, causing some users to be blocked or have performance problems. In order to discover and solve table lock problems in a timely manner, we can query the table lock situation in a variety of ways. Below we will introduce several common methods and attach specific code examples. 1. Query the lock information of the current session through the following SQL statement
- Linux Operation and Maintenance 1396 2024-03-07 08:36:04
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- Function comparison between Oracle11g and Oracle12c
- Oracle Database is one of the most popular relational database management systems in the world. In recent years, Oracle has successively launched two versions, Oracle11g and Oracle12c. They have many features in common, but also have some significant differences. This article will conduct a comparative analysis of the functions of the two versions and provide some specific code examples to help readers better understand the differences between them. 1. Functional features of Oracle11g: partition table and partition index: Oracle1
- Linux Operation and Maintenance 427 2024-03-06 21:51:04
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- How to detect table locks in Oracle database
- In Oracle database, table lock is a locking operation on the database table to ensure the integrity and consistency of the data. Table locks are divided into shared locks and exclusive locks. Shared locks allow multiple sessions to read data at the same time, but do not allow other sessions to modify the data; exclusive locks only allow one session to write operations, and other sessions cannot read or modify the data. . In practical applications, we often need to detect table lock situations to ensure the smooth progress of database operations. In Oracle database, table locks can be detected through the following methods
- Linux Operation and Maintenance 1031 2024-03-06 21:45:03
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- Comparative analysis of performance of Oracle11g and Oracle12c
- Oracle database has always been one of the most widely used relational database management systems in enterprises. Among the many versions, Oracle11g and Oracle12c are two versions that have attracted much attention. This article will conduct a comparative analysis of the performance of Oracle11g and Oracle12c, and demonstrate their differences, advantages and disadvantages through specific code examples. 1. Database architecture comparison Oracle11g and Oracle12c have some differences in database architecture. Oracle12c introduced
- Linux Operation and Maintenance 780 2024-03-06 21:03:04
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- Effective measures to solve Oracle listening server failure
- Effective measures to solve Oracle listening server failures require specific code examples. With the continuous improvement of enterprise informatization, databases have become more and more important in enterprises. Oracle, as a commonly used database management system, is widely used in enterprises. However, database servers often experience various failures, among which the failure of the listening server is relatively common and has a greater impact. When the Oracle listening server fails, the database will not be able to connect normally, affecting the normal operation of the business. Therefore, timely measures are needed to
- Linux Operation and Maintenance 737 2024-03-06 18:03:04
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- Authorization and revocation operation steps for read-only permissions on Oracle tables
- As a powerful enterprise-level relational database management system, Oracle database provides rich permission management functions. In practical applications, it is sometimes necessary to grant read-only permissions to specific users or roles to protect sensitive data from accidental modification. This article will introduce how to authorize and revoke read-only permissions on tables in Oracle database, and provide specific code examples. 1. Grant read-only permissions (1) Grant read-only permissions to users. In the Oracle database, you can grant read-only permissions to specific users through the GRANT statement.
- Linux Operation and Maintenance 1298 2024-03-06 17:48:04
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- Solution to Oracle listening server failure
- Due to the failure of the Oracle database listening server, the database may not be accessible normally, affecting the use of the database. This article will introduce some possible causes and solutions for Oracle listening server failure, and attach specific code examples. 1. The listening server fails. Possible reasons: The listening service is not started. The listening configuration file is incorrect. Network connection failure. The firewall blocks the listening port. 2. Solution 2.1. Make sure the listening service is started. Run the following command on the database server to start the listening service: lsnrctls.
- Linux Operation and Maintenance 1044 2024-03-06 17:45:05
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