current location：Home > Technical Articles > Database > Oracle
- Direction：
- All web3.0 Backend Development Web Front-end Database Operation and Maintenance Development Tools PHP Framework Daily Programming WeChat Applet Common Problem Other Tech CMS Tutorial Java System Tutorial Computer Tutorials Hardware Tutorial Mobile Tutorial Software Tutorial Mobile Game Tutorial
- Classify：
-
- How to perform character set conversion in oracle
- Oracle Character Set Conversion When using Oracle database, it is sometimes necessary to convert between character sets. For example, when the source database character set does not support certain characters, they need to be converted to the target character set for correct storage and processing. Oracle provides several methods to convert character sets. Two commonly used methods will be introduced below: exp/imp and ALTER DATABASE CHARACTER SET. Method 1: Use exp/imp for character set conversion. The exp and imp commands are Orac.
- Oracle 2698 2023-04-17 13:50:32
-
- How to lock table in oracle
- In Oracle database, when multiple users access the same table at the same time, data chaos may occur. At this time, we may need to lock the table to avoid this situation. There are multiple lock mechanisms in Oracle, including shared locks and exclusive locks. This article will introduce how to lock tables in Oracle. 1. Shared lock Shared lock is the most common locking method. It allows multiple users to read the same data block or record at the same time, but does not allow modification of the data block or record. The basic syntax of a shared lock is as follows: ```LOCK TA
- Oracle 4800 2023-04-17 13:49:41
-
- How to call stored procedure in Oracle database
- Oracle Database, one of the most popular relational databases in the world, supports features such as stored procedures, triggers, and functions that can perform data operations and business logic more efficiently. This article explains how to call stored procedures in an Oracle database. What is a stored procedure? A stored procedure is an executable program object in the database. It can receive parameters, execute a series of SQL statements, run business logic and return results during execution. Stored procedures are usually used for repetitive data processing operations and complex data manipulation processes.
- Oracle 4195 2023-04-17 13:49:11
-
- How to perform a silent installation of Oracle 11g
- In daily work, server managers often need to install the same software, such as Oracle database, on multiple servers. For this task, manually operating on each server would be very time-consuming and laborious, so silent installation has become the preferred deployment method. This article will introduce how to perform a silent installation of Oracle 11g. 1. Preparation work Before silently installing Oracle 11g, some preparation work is required: 1.1 Download the Oracle software package and extract it to a directory. 1.2 Configure Ora
- Oracle 1067 2023-04-17 10:06:31
-
- How to query row data in oracle
- Oracle is a very popular relational database management system, which contains a rich query language that can retrieve, filter, sort and other operations on data in the database. Oracle provides a variety of methods for querying row data. Here are some commonly used query methods. 1. Use the SELECT statement to query row data. The SELECT statement is the most basic and commonly used query statement in Oracle. It can query row data under specified conditions. For example, query the information of employees whose salary is greater than 5000 in the employee table.
- Oracle 2571 2023-04-17 10:05:45
-
- Discuss how Oracle queries table permissions
- Oracle is a common database management system that is widely used in various fields. In Oracle, tables are the basic unit of data storage, and table permissions are a very important concept when using Oracle database. Today we will discuss how to query table permissions. First, we need to understand the table permissions in Oracle. In Oracle, table permissions include SELECT, INSERT, UPDATE and DELETE. Where:- SELECT: Query the data in the table. -INS
- Oracle 5530 2023-04-17 10:05:33
-
- How to delete table index in oracle
- Oracle is a commonly used enterprise-level relational database management system used to store and manage large amounts of data. In Oracle, table indexes are an important part used to improve query efficiency, but sometimes table indexes need to be deleted. This article will introduce how to delete table indexes in Oracle. 1. Check the table index. Before deleting the table index, you need to know what indexes the current table has. You can view the table index by executing the following SQL query: SELECT INDEX_NAME FROM USER_INDEXES W
- Oracle 13640 2023-04-17 10:05:20
-
- Detailed explanation of how to delete dbf files in Oracle
- Detailed explanation of how to delete dbf files in Oracle In Oracle database, dbf files are a type of data files used to store database data. Deleting a dbf file may be due to insufficient storage space or to change the database structure, but this process needs to be handled with care to prevent data loss or database corruption. Here's how to delete dbf files in an Oracle database: 1. Confirm the status of the data files and shut down the database. Before deleting the dbf file, you first need to confirm its status,
- Oracle 4671 2023-04-17 10:04:40
-
- Oracle 64 or 32: How to choose the best database edition?
- Oracle 64 or 32: How to choose the best database edition? As a database administrator or application developer, choosing the right database version is very important. When deciding to use an Oracle database, the most basic question is whether to choose the 32-bit or 64-bit version. In this article, we'll look at how to decide whether you should choose a 64-bit or 32-bit version of Oracle Database, and we'll discuss the advantages and disadvantages of both versions. 32-bit Oracle Database version 32-bit O
- Oracle 967 2023-04-17 10:02:02
-
- Basic knowledge and usage of Oracle 10g
- Oracle 10g is a very popular relational database management system, which is mainly used to process large-scale data. Learning how to use Oracle 10g can be a huge help in your career. This article will introduce the basic knowledge and usage of Oracle 10g to help you quickly become an Oracle database administrator. 1. Installation of Oracle 10g Before installing the Oracle database, you need to ensure that your computer meets some basic hardware and software requirements. First you need
- Oracle 919 2023-04-17 10:01:49
-
- How to configure server physical memory during Oracle installation
- In recent years, with the continuous growth of data volume, the application of large-scale database management system Oracle in enterprises has become more and more popular. In response to Oracle's application requirements, the server hardware capacity needs to be strictly configured during the installation process. Among them, physical memory is an indispensable configuration item. This article will share how to configure server physical memory during the Oracle installation process. 1. Understand physical memory Physical memory, also known as Physical Random Access Memory (PRAM),
- Oracle 823 2023-04-17 09:58:49
-
- How to set user password in oracle
- After the Oracle database is installed, you need to set up one or more users to access it in order to manage and maintain the database. This article will introduce how Oracle sets user passwords. In Oracle, the user's password is encrypted and stored in the database. Admin users have the authority to assign new passwords to new users or change existing passwords. There are two ways to set user passwords: using SQL statements or using Oracle Enterprise Manager (OEM). Below are detailed instructions for both methods. Set using SQL statement
- Oracle 4030 2023-04-17 09:56:55
-
- How to set permissions in oracle
- Oracle is a powerful database system, and its security is also highly valued. In Oracle, permission setting is very important. It can control the user's permissions and operation scope to access the database, thereby ensuring data security. This article will introduce in detail the methods and steps for setting permissions in Oracle. 1. User creation In Oracle, you first need to create a user before you can control its permissions. Other users can be created using the SYS system administrator user, or new users can be created using other users with administrative rights. The command to create a user is as follows:
- Oracle 3869 2023-04-17 09:56:28
-
- Share the oracle ocp tutorial in one article
- Oracle OCP Tutorial Oracle OCP (Oracle Certified Professional) certification is a professional certification for Oracle database managers. It is a global basic certification project of Oracle for database developers and managers. It is one of the important measures to certify Oracle technology and application capabilities. The purpose of OCP certification is to prove that applicants have professional knowledge and skills in the use and management of Oracle, and can better meet the needs of enterprises.
- Oracle 1311 2023-04-17 09:55:36
-
- How to remove duplicate records in Oracle
- Oracle Removes Duplicate Records Oracle is one of the largest relational database management systems in the world. Its powerful functions and wide range of applications make it an indispensable part of enterprise-level applications. In these applications, data deduplication is a common task. Removing duplicate records can improve data quality and reduce storage space and query time. In Oracle, you can use multiple methods to remove duplicate records: 1. DISTINCT keyword Using the DISTINCT keyword can return a unique result set, which means there will not be any duplicate records.
- Oracle 2822 2023-04-17 09:55:15
Recommended Articles
Tool Recommendations
jQuery enterprise message form contact code
jQuery enterprise message form contact code is a simple and practical enterprise message form and contact us introduction page code.
form button
2024-02-29
HTML5 MP3 music box playback effects
HTML5 MP3 music box playback special effect is an mp3 music player based on HTML5 css3 to create cute music box emoticons and click the switch button.
Player special effects
2024-02-29
HTML5 cool particle animation navigation menu special effects
HTML5 cool particle animation navigation menu special effect is a special effect that changes color when the navigation menu is hovered by the mouse.
Menu navigation
2024-02-29
jQuery visual form drag and drop editing code
jQuery visual form drag and drop editing code is a visual form based on jQuery and bootstrap framework.
form button
2024-02-29
Organic fruit and vegetable supplier web template Bootstrap5
An organic fruit and vegetable supplier web template-Bootstrap5
Bootstrap template
2023-02-03
Bootstrap3 multifunctional data information background management responsive web page template-Novus
Bootstrap3 multifunctional data information background management responsive web page template-Novus
backend template
2023-02-02
Real estate resource service platform web page template Bootstrap5
Real estate resource service platform web page template Bootstrap5
Bootstrap template
2023-02-02
Simple resume information web template Bootstrap4
Simple resume information web template Bootstrap4
Bootstrap template
2023-02-02
Cute summer elements vector material (EPS PNG)
This is a cute summer element vector material, including the sun, sun hat, coconut tree, bikini, airplane, watermelon, ice cream, ice cream, cold drink, swimming ring, flip-flops, pineapple, conch, shell, starfish, crab, Lemons, sunscreen, sunglasses, etc., the materials are provided in EPS and PNG formats, including JPG previews.
PNG material
2024-05-09
Four red 2023 graduation badges vector material (AI EPS PNG)
This is a red 2023 graduation badge vector material, four in total, available in AI, EPS and PNG formats, including JPG preview.
PNG material
2024-02-29
Singing bird and cart filled with flowers design spring banner vector material (AI EPS)
This is a spring banner vector material designed with singing birds and a cart full of flowers. It is available in AI and EPS formats, including JPG preview.
banner picture
2024-02-29
Golden graduation cap vector material (EPS PNG)
This is a golden graduation cap vector material, available in EPS and PNG formats, including JPG preview.
PNG material
2024-02-27
Home Decor Cleaning and Repair Service Company Website Template
Home Decoration Cleaning and Maintenance Service Company Website Template is a website template download suitable for promotional websites that provide home decoration, cleaning, maintenance and other service organizations. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-05-09
Fresh color personal resume guide page template
Fresh color matching personal job application resume guide page template is a personal job search resume work display guide page web template download suitable for fresh color matching style. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-29
Designer Creative Job Resume Web Template
Designer Creative Job Resume Web Template is a downloadable web template for personal job resume display suitable for various designer positions. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-28
Modern engineering construction company website template
The modern engineering and construction company website template is a downloadable website template suitable for promotion of the engineering and construction service industry. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-28
