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Oracle

oracle change user password

Oracle changes user password Oracle is a popular relational database system that allows multiple users to share the same database. In Oracle, each user has his or her own username and password to access the database. If you are a database administrator or a user who has forgotten your password, here are some steps to help you change your Oracle user password. 1. Connect to the Oracle database and enter the command line and enter the SQLPLUS command, as shown below: sqlplus sys as sysdba is required when logging in

May 11, 2023 pm 12:01 PM

oracle delete instance

Oracle is a very popular relational database management system. When using Oracle, sometimes you need to delete an instance (instance), for example, because you want to rebuild a new instance or because you need to clear old data. This article will introduce how to delete an Oracle instance. First, we need to confirm the status of the current instance. You can check using the following command: ```$ ps -ef | grep pmon```If the instance is running, one or more processes following it will be output, as shown below

May 11, 2023 pm 12:00 PM

ORACLE practical tutorial

ORACLE is a widely used database management system with complete functions and powerful performance, and is widely used in enterprise information construction. This article will introduce some practical ORACLE tutorials to help beginners get started quickly. 1. Install ORACLE ORACLE installation requires the installation of ORACLE database, ORACLE client and ODBC driver. Before installation, you need to determine the system configuration and requirements, and then download the corresponding version of the installer. During the installation process, you need to pay attention to some details, such as setting the instance name correctly.

May 11, 2023 am 11:56 AM

oracle usage tutorial

Oracle is a relational database management system that is widely used for data storage, management and processing by major commercial enterprises around the world. Oracle has also become the market leader in database management systems and is widely used in many industries. In this article, we will take an in-depth look at the basic usage tutorials of Oracle. 1. What is Oracle? Oracle is a relational database management system. It was created in 1977 and was developed by Larry Ellison, Ed Oates and Bob Miner. Ora

May 11, 2023 am 11:48 AM

oracle compilation process

Overview of the Oracle compilation process The Oracle compilation process is an important function in the Oracle database system. It is the process of converting SQL statements into executable code. In the Oracle database, the compilation process consists of multiple steps such as SQL statement parsing, syntax checking, semantic checking, execution plan generation and code generation. SQL statement parsing The parsing of SQL statements is the first step in the Oracle compilation process. Its main purpose is to convert SQL statements into internal data structures. During this process, Oracle will

May 11, 2023 am 11:48 AM

oracle port modification

Oracle is a popular relational database management system that uses ports to communicate within a computer network. A port is an address that identifies an application and allows the server to communicate with other computers over the network. Oracle database uses port 1521 for communication by default. However, in some cases, you may need to change the port settings of your Oracle database. In this article, we will introduce how to modify the Oracle port. 1. Stop the listening program in the Oracle database. Before modifying the Oracle port, you need to

May 11, 2023 am 11:47 AM

sql tutorial oracle

SQL Tutorial: OracleOracle is one of the most widely used and popular database management systems in the industry. Oracle Corporation is one of the most influential software companies in the world and a leader in data management software. Oracle's database system has become a very important infrastructure in almost all enterprises. This article will introduce the basic syntax of Oracle SQL and some commonly used operations. Oracle SQL Basic Syntax SQL is the full name of Structured Query Language. It is a method used to manage data storage and retrieval.

May 11, 2023 am 11:46 AM

oracle installation and use

Oracle is currently the most widely used relational database management system in private enterprises around the world, with powerful and stable data processing and data storage capabilities. Oracle can run on various operating systems such as Windows and Linux, supports multiple programming languages, such as C, C++, Java, Python, etc., and provides complete development tools, such as PL/SQL, SQL Developer, etc. This article will introduce the installation and use of Oracle. 1. Oracle installation 1. Download Oracle

May 11, 2023 am 11:37 AM

oracle10g win7 installation

Oracle10g is a very popular relational database system that can be installed on the Windows 7 operating system. In this article, we will provide detailed steps and guidelines to help readers successfully complete the installation process of Oracle10g on Windows 7. Step 1: Download the Oracle10g software First, we need to download the Oracle10g software for installation. You can download the latest version of Oracle10g software from the official website, or from a third-party

May 11, 2023 am 11:36 AM

oracle stored procedure returns result set

Oracle is one of the most widely used relational database management systems in the world. It has the advantages of good stability, scalability and security. In addition, Oracle also provides a stored procedure function, which is a series of processes executed in the database. A collection of SQL statements whose syntax is similar to PL/SQL. Stored procedures are mainly used to simplify repetitive code, improve code reusability, speed up data processing, etc. This article will introduce how to write stored procedures in Oracle and return result sets. 1. The basics of stored procedures in Oracle, storage

May 11, 2023 am 11:33 AM

Query oracle parameters

Oracle is a very powerful and widely used relational database management system. Its operation and performance are affected by multiple parameter configurations. In order to obtain the best operating results, we need to set and adjust these parameters. So, how to query Oracle parameters? See below. The first way: Using SQL commands We can use SQL commands to query Oracle parameters. The specific steps are as follows: 1. Log in to the Oracle database system; 2. Open the SQL command line or use Oracle SQL development tools (

May 11, 2023 am 11:29 AM

Han Shunping oracle tutorial

With the rapid development of information technology, more and more people are paying attention to database technology. Among them, Oracle database, as one of the most popular databases in the world, has attracted much attention. Teacher Han Shunping's Oracle tutorial is one of the indispensable resources for developers to learn Oracle database. Let's introduce this tutorial in detail below. 1. Teacher Han Shunping Teacher Han Shunping is a famous IT teacher with many years of teaching experience. His senior practical database experience has given him in-depth knowledge in database fields such as Oracle, MySQL and SQL Server.

May 11, 2023 am 11:22 AM

oracle string replacement

Title: Detailed explanation of Oracle string replacement (Replace) syntax and usage Oracle is a popular relational database management system, and its powerful SQL functions are widely used in various industries and fields. Among them, the string replacement operation (Replace) has very important practical application value. This article will introduce its syntax and usage in detail. 1. Syntax of Replace function The Replace function is a function in Oracle used to replace substrings in a string. Its syntax is as follows: ```sqlRE

May 11, 2023 am 11:21 AM

Example of oracle stored procedure

A stored procedure is a precompiled database program that contains a set of SQL statements and control statements that can be called when needed. This article will introduce the basic knowledge and examples of Oracle database stored procedures. 1. Basics of stored procedures 1.1 Advantages of stored procedures Stored procedures are an effective method to improve database performance. They improve the efficiency of application interaction with the database because SQL statements are precompiled on the database side, allowing them to complete operations more quickly when called. It can also increase data security because stored procedures can create and modify data in the database.

May 11, 2023 am 11:13 AM