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- How to change Oracle password (three methods)
- Oracle database administrators often need to change user passwords to ensure database security. If you are an Oracle database administrator, here are several ways to change the Oracle database user password. Method 1: Use SQL*Plus to change the Oracle user password 1. Log in to the system administrator account. First, log in to the Oracle database system administrator account. You need to use the SQL*Plus command line interface to operate. 2. Connect to the database and use the following SQL*Plus command to connect to Oracle
- Oracle 39874 2023-04-17 14:51:30
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- How to query comments in Oracle database
- Oracle Database is a popular relational database management system widely used in enterprise-level applications and data warehouses. When using Oracle database, you often need to query information about objects such as tables, views, and stored procedures. To facilitate querying and maintaining objects in the database, we can add comments to them. In this article, we will introduce how to query comments in Oracle database. Oracle Database supports adding comments to various database objects. We can add objects such as tables, columns, views, functions, stored procedures, triggers and packages
- Oracle 6234 2023-04-17 14:53:39
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- How to write SQL statements for Oracle stored procedures
- Oracle Stored Procedures SQL Statements A stored procedure is a set of predefined SQL statements that can be called multiple times during execution. It's like a template where you can define specific parameters and logic that will be executed every time it's called. Oracle database supports stored procedures. Below we will introduce how to write Oracle stored procedure SQL statements. 1. Create a stored procedure To create an Oracle stored procedure, you need to use CREATE PROCEDU
- Oracle 1172 2023-04-17 14:54:02
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- Let's talk about how to install Oracle database on Linux
- This article explains how to install Oracle Database on Linux. 1. Install necessary software packages Before installing the Oracle database, you need to install some necessary software packages. The following are sample commands to install these packages on CentOS 7: ```$ sudo yum install -y gcc gcc-c++ libaio-devel glibc-common glibc-devel ```2. Create Oracle
- Oracle 669 2023-04-17 14:55:47
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- How to solve the problem that Oracle cannot listen to the program
- When using Oracle database, you often encounter some problems. Among them, being unable to monitor the program is one of the more common errors. This problem will cause the database to fail to start, and may even affect the normal operation of the entire system. So, when we encounter an error that the program cannot be monitored, how should we solve it? 1. Confirm whether the listener is started. When the problem of being unable to monitor a program occurs, the first step to confirm is whether the listener is started. You can view the status of the listener by running the command lsnrctl status. Required if the listener is not started
- Oracle 6863 2023-04-17 14:56:11
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- How to change the sys password of Oracle database
- Oracle is a software widely used in enterprise-level database management systems. When using Oracle database, system administrators need to regularly maintain the security of the database. One of the important tasks is to regularly change the password of the database system administrator sys. This article will introduce how to modify the sys password of the Oracle database. 1. Connect to the database, open a command prompt or terminal in the operating system, and enter the following command: ```sqlplus /nolog```This command will enter Orac
- Oracle 4279 2023-04-17 14:57:06
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- How to start and stop the oracle service
- Oracle is a common relational database management system. When using Oracle, starting and stopping services are very common operations. This article will introduce how to start and stop the Oracle database service. How to start the Oracle database service: 1. Use the command line to start the service. In the Windows system, press the Win+R key combination to open the run dialog box. Type "cmd" and press Enter to open the command prompt window. Enter the following command in the command line window: net start OracleS
- Oracle 3642 2023-04-17 15:02:22
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- How to query data volume in oracle
- Oracle is a powerful database management system that is widely used in enterprise data management and processing. In Oracle, querying data is one of the most basic and common operations. This article will introduce how to query data volume in Oracle. Overview When dealing with large amounts of data, it is very important to understand the amount of data in the database. The Oracle database provides a variety of ways to query data volume to meet user needs. Method 1: SELECT COUNT(*) statement Use SELECT COUNT(*) statement to calculate
- Oracle 11429 2023-04-17 14:58:28
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- How to install linux oracle database
- With the advent of the era of cloud computing and big data, Oracle database plays an increasingly important role in enterprise-level applications and data storage. Among many databases, Oracle database has the advantages of high availability, scalability, security and performance, so it is widely used in production environments. This article will focus on how to install the Oracle database on the Linux operating system. 1. Software preparation Before starting to install the Oracle database, you need to prepare the corresponding software. First you need a Linux operating system, such as Red
- Oracle 2441 2023-04-17 14:57:57
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- Explore the if function in Oracle query statements and how to use it
- In Oracle, the if statement is a very useful query statement that allows us to selectively execute queries based on specific conditions. In this article, we will explore the if function in Oracle query statements and how to use it. First, we need to understand the syntax of the if statement. The if statement in Oracle is very similar to the if statement in other programming languages. Its basic syntax is as follows: ```sqlSELECT col1, col2, ...,coln FROM table_name WH
- Oracle 4026 2023-04-17 14:57:49
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- How to query the tables under the user in Oracle
- Oracle is a commonly used database management system that is often used to store enterprise data. If you want to query the tables under the user in Oracle, you need to perform the following steps: 1. Log in to the Oracle database and enter your user name and password. 2. Execute the following SQL statement: SELECT TABLE_NAME FROM USER_TABLES; This statement will query the names of all tables under the currently logged in user. 3. If you want to query other users’ tables, you can use the following SQL statement:
- Oracle 10306 2023-04-17 14:57:29
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- How to install redhat oracle10g
- RedHat Enterprise Linux is a widely used operating system, and Oracle 10g is a very popular relational database management system. This article will introduce how to install Oracle 10g in RedHat Enterprise Linux. 1. Preparation 1. Install RedHat Enterprise Linux 2. Download the Oracle 10g installation file 3. Make sure the users and groups required for Oracle installation have been established 4. Make sure there is at least 2GB of disk space on the system 5.
- Oracle 671 2023-04-17 14:57:09
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- How to query the number of records in oracle
- Oracle, as a relational database management system, is very commonly used in our daily work. When using Oracle to query data, you often need to know how many records there are in the query results. This article will introduce how to query the number of records in Oracle. There are several ways to query the number of records in Oracle: 1. Use the COUNT function. The COUNT function is a statistical function in Oracle that can be used to count the number of values or rows in a column that are not NULL. The number of records in the query result can be obtained through the COUNT function. language
- Oracle 3069 2023-04-17 14:56:49
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- Focus on the method of deleting Oracle table space files
- As the amount of data grows, the table spaces in the Oracle database will continue to increase, and the resulting table space files will also occupy corresponding disk space, which is a big problem for database administrators. Once there are too many table space files, it will not only bring inconvenience to database management, but also put pressure on the system's disk space. Therefore, when managing Oracle database, deletion of table space files is particularly important. This article will focus on how to delete Oracle table space files. 1. Delete data in table space in Oracle. First
- Oracle 4749 2023-04-17 14:56:29
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- Detailed explanation of the Oracle database installation process on Linux systems
- In recent years, with the continuous development of computer technology, Linux operating system has gradually taken a dominant position in the server field. As one of the most well-known relational database management systems in the industry, Oracle database has also become the first choice of many enterprises. Therefore, installing Oracle database on Linux systems has become one of the necessary skills for many IT professionals. This article will introduce the installation process of Oracle database based on Linux system. 1. Prepare the installation environment. Before installing the Oracle database, you need to prepare the installation environment first.
- Oracle 2359 2023-04-17 14:56:09
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