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- How to configure Oracle after installation
- Oracle is a powerful database management system that is widely used in the development and management of enterprise-level applications. After installing Oracle, we still need to do some configuration to ensure that it runs properly and meets our needs. The following will introduce some configuration operations that need to be performed after Oracle installation. 1. Set environment variables When installing Oracle, we need to add the Oracle installation path to the system environment variables. This makes it easier for us to use Oracle related commands on the command line. In Windows system
- Oracle 1934 2023-04-18 15:43:51
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- How to perform hexadecimal conversion in oracle
- Oracle is a relational database management system that is widely used in the development of enterprise-level applications. In Oracle database, we often need to perform base conversion, such as converting decimal to binary or hexadecimal. This article will introduce the base conversion function and its application in Oracle. Commonly used bases in Oracle include binary (base 2), octal (base 8), decimal (base 10) and hexadecimal (base 16). 1. Binary conversion function: TO_BINARY_DOUBLE, TO_BI
- Oracle 3198 2023-04-18 15:50:10
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- How to query oracle time format
- There are many different time formats in Oracle Database that can be used to store and display date and time information. The correct time format is very important when querying and analyzing data. This article will introduce how to query the date and time format in the Oracle database, and how to output the date and time data into the specified format. Oracle Date Format The date formats supported by Oracle database include: 1. Year-Month-Day (YYYY-MM-DD) 2. Month/Day/Year (MM/DD/YYYY) 3. Day.Month.Year
- Oracle 5990 2023-04-18 15:49:06
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- What should I do if Oracle cannot connect to the database?
- It is very common for enterprises to use Oracle databases, but due to various reasons, sometimes it is found that the database cannot be connected. At this time, you need to analyze and troubleshoot the problem to find the cause and solve it. First, we need to check if the database server is started. In the Oracle database, you can use the following command to check: ```lsnrctl status``` If the database server has been started, but we still cannot connect, you need to check whether there is a network failure. For example, check that firewall rules are set correctly and confirm
- Oracle 3642 2023-04-18 15:47:41
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- How to modify the IP address of Oracle database
- How to modify the IP address of Oracle database Oracle database is one of the most popular relational databases in the world. It can run on various operating system platforms, including Windows, Linux and Unix. In practical applications, we often need to modify the IP address of the Oracle database to adapt to different network environments. This article will introduce you to how to modify the IP address of Oracle database. Step 1: Check the current IP address. Before modifying the Oracle database IP address, we first
- Oracle 4631 2023-04-18 15:46:33
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- How to set up auto-increment in oracle
- There is no built-in auto-increment feature in Oracle Database, but there are many ways to simulate it. The following are some methods for simulating auto-increment: 1. Sequence Sequence is an object used to generate unique numbers in Oracle database, similar to auto-increment. Sequences can be created separately before or after the table is created, and can be changed as needed. First, create the sequence: ```CREATE SEQUENCE seq_nameSTART WITH 1INCREMENT BY 1NO
- Oracle 6889 2023-04-18 15:45:02
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- How to query oracle user space
- Oracle database is one of the most commonly used databases at present. Its use covers many fields such as enterprise applications, large data warehouses and cloud solutions. In Oracle, each user is allocated a certain amount of space to store his own objects, such as tables, indexes, views, etc. Therefore, querying Oracle user space is very necessary. There are many ways to query Oracle user space, including SQL query, Oracle Enterprise Manager (OEM) or PL/SQL.
- Oracle 1918 2023-04-18 15:44:17
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- How to batch modify Oracle
- Oracle is one of the most popular and popular database management systems in the world. It can handle large amounts of data and provides high scalability and flexibility. Oracle also provides many powerful tools and features, making it the first choice for enterprise-level data management. In Oracle, we can use SQL statements to query, update, insert and delete data. However, if you want to modify a large amount of data at the same time, manually changing one by one is obviously not the best choice. This article will introduce how to use Oracle's tools and syntax to modify data in batches. 1. Use SQ
- Oracle 5850 2023-04-18 15:42:15
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- How to query column data in oracle
- Oracle is a powerful database management system that allows users to query and manage data in the database through SQL language. In Oracle, querying column data is a very common operation because it can help users quickly obtain the required data. This article will introduce how to use Oracle to query column data. Querying Single Column Data To query a column of data, we can use the SELECT statement. Here is a basic SELECT statement: SELECT column_name FROM table_nam
- Oracle 1540 2023-04-18 15:41:33
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- What is the use of oracle?
- As a database management system, Oracle has a wide range of uses and plays an important role in the field of enterprise application systems and data management. This article will introduce the uses of Oracle database, including enterprise-level applications, data analysis, data warehouse, e-commerce, etc. 1. Enterprise-level applications Oracle database is widely used in enterprise-level applications, such as large-scale ERP systems, such as Oracle E-Business Suite, SAP, PeopleSoft, etc. These systems need to be efficient, reliable, safe, and stable.
- Oracle 1635 2023-04-18 14:54:36
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- How to partition Oracle
- Oracle Database is a very powerful database management system that can be used to manage large data and store and retrieve data quickly. In databases, partitioning is the process of dividing a table or index into small, manageable parts, thereby improving query and maintenance performance. Oracle provides multiple types of partitions that can help administrators partition data according to data access methods, storage requirements, and other needs. The following are several types of partitioning: 1. Range partitioning Range partitioning is based on the value range of a column. Administrators define a set of discrete values and then convert the data
- Oracle 2037 2023-04-18 14:57:04
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- Examples to explain how to use oracle c (tutorial)
- Oracle C Tutorial Oracle C is a complete development platform launched by Oracle for C language developers. It provides a series of tools and libraries so that developers can easily develop C language in Oracle database without using other tools. development tools. This tutorial will briefly introduce the main features of Oracle C and provide some practical usage methods. 1. Characteristics of Oracle C 1. Supports multiple platforms Oracle C can be developed on a variety of different platforms, including Unix,
- Oracle 1000 2023-04-18 15:00:32
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- How to execute stored procedures in Oracle regularly
- In enterprise-level applications, we cannot just rely on users to perform manual operations to achieve the desired functionality. Therefore, scheduled tasks are essential, which are especially useful for performing background processing and data loading. Oracle database provides stored procedures and scheduled tasks to simplify the work of developers and administrators. In this article, we will focus on the method of using Oracle scheduled tasks to execute stored procedures regularly. Oracle Scheduled Tasks Scheduled tasks in Oracle database can be created using the DBMS_SCHEDULER package. this
- Oracle 4319 2023-04-18 15:17:24
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- How to query column data in oracle
- Oracle is a relational database management system whose most important function is to store and retrieve data. Good querying skills are key when working with databases, as tens of millions of rows of data need to be sifted out to find the information you need. This article will introduce how to query column data in Oracle database. 1. SELECT statement The SELECT statement is the most commonly used query statement in Oracle. Its basic format is as follows: SELECT column1, column2, ...FROM table_name; where
- Oracle 2171 2023-04-18 15:17:44
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- Let's talk about Oracle's commonly used query and judgment statements
- Oracle query judgment Oracle is a widely used relational database system. It has efficient data storage and query capabilities and has become one of the indispensable tools in enterprise management. When using Oracle for data query, we need to filter the required data through judgment statements. In this article, we will introduce the relevant knowledge of Oracle queries and commonly used query judgment statements. 1. Basic query statement In Oracle, we use the SELECT statement for data query. Its basic form is as follows: SELECT co
- Oracle 2730 2023-04-18 15:14:07
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