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Technical Articles

Database

Oracle

oracle delete username

Oracle database is currently the most popular commercial relational database management system in the world. It is widely used for its efficiency, security, stability and other advantages. In Oracle database, all users have unique user names, but sometimes we need to delete some unnecessary or redundant user names. This article will introduce how to delete username in Oracle database. 1. First, we need to log in to the Oracle database using an account with administrator privileges. 2. Then, we use the following SQL statement to query all users in the current database

May 13, 2023 pm 03:59 PM

oracle delete user delete table space

Oracle is one of the large-scale relational database management systems that is often used for the development and management of enterprise-level applications. In Oracle, deleting users and deleting table spaces is a very common operation, but if problems occur accidentally, it may lead to serious consequences. This article will introduce how to correctly delete users and table spaces in Oracle, and provide some suggestions to prevent accidental deletion. 1. Deleting users In Oracle, deleting users is a common operation. Typically, if a user no longer needs access to the database, they need to be removed from the database

May 13, 2023 pm 03:49 PM

oracle 12 linux installation

Oracle is a relational database management system developed by Oracle Corporation to provide efficient and scalable data management solutions. It is very important to install Oracle database on Linux operating system because it can provide more efficient performance and better reliability. In this article, we will explain how to install Oracle 12 database on Linux system. 1. Preparation Before starting the Oracle 12 Linux installation, you need to prepare the following items

May 13, 2023 pm 03:34 PM

oracle delete temporary table

Oracle is a powerful relational database management system. In the process of using Oracle, we often need to create temporary tables to temporarily store some data or perform some temporary data processing operations. However, after the temporary table is used, we also need to delete it to release database resources. So, in this article, I will introduce how to delete temporary tables in Oracle. 1. What is a temporary table? A temporary table is a special type of Oracle table used to temporarily store and process data during a user session. they can save

May 13, 2023 pm 03:28 PM

c calls oracle stored procedure

In software development, calling stored procedures is one of the common database operations. Oracle is a commonly used relational database management system, so when calling a stored procedure, you need to use the interface it provides to complete the process. This article will introduce how to use C language to call Oracle stored procedures. 1. Introduction to Oracle Stored Procedures Oracle stored procedures are predefined blocks of code used to perform specific tasks or operations. After you create a stored procedure in the database, you can call it in your program and pass parameters and return values. This advantage can be

May 13, 2023 pm 03:27 PM

oracle changes user password

Oracle is a relational database management system that is widely used in enterprise-level database management. In Oracle, the user's password is very important and needs to be changed regularly to ensure security. This article will introduce how to change the password of Oracle user. 1. Use the sqlplus command to log in to the Oracle database. First, use the sqlplus command to log in to the Oracle database. Enter the following command: sqlplus /nolog. Then enter the following command to log in to the Oracle database: SQL> con

May 13, 2023 pm 03:24 PM

How to convert oracle

Databases stored on the cloud With the rapid development of cloud computing technology, more and more companies are beginning to store their data on the cloud, including Oracle databases. Storing Oracle databases on the cloud can bring many benefits, including higher availability, better data security, easier data backup and recovery, and more. So, how to store Oracle database on the cloud? This article will introduce it to you in detail. Step 1: Choose a suitable cloud platform First, you need to choose a cloud platform suitable for storing Oracle database. There are many Yunping on the market

May 13, 2023 pm 03:15 PM

oracle 10g tutorial

Oracle 10g Tutorial Oracle 10g is an enterprise-level database management system launched by Oracle Corporation and is commonly used in large enterprises and government agencies. It provides a variety of features and tools for managing, storing and processing large amounts of data. The following is a simple Oracle 10g tutorial to help beginners understand and get started with this database system. 1. Install Oracle 10g. To install Oracle 10g, you need to download and run the installation program. During the installation process, you need to set the database username, password and

May 13, 2023 pm 03:09 PM

oracle connection number modification

Oracle database is a high-performance, high-availability relational database system that is widely used in enterprise-level applications. When using Oracle database, we may encounter the problem of too many connections, which requires corresponding modification of the number of connections. In this article, we will introduce how to modify the number of connections to the Oracle database. 1. What is the number of Oracle connections? In the Oracle database, the number of connections refers to the number of sessions that establish connections with the database. Whenever an application connects to a database through a database client driver,

May 13, 2023 pm 03:00 PM

Get oracle stored procedure

In Oracle database, stored procedure is an important database object that allows users to define their own logical processing procedures in the database. Stored procedures can contain a series of PL/SQL codes, can call other stored procedures and functions, and can use variables, conditional statements and loop control structures, and are very powerful. When we need to obtain Oracle stored procedures, we generally need to perform the following steps. The first step is to log in to the Oracle database. We need to use Oracle SQL Developer or other data

May 13, 2023 pm 02:57 PM

oracle delete tablespace user

Oracle is a commonly used relational database management system with powerful storage and query capabilities, but at the same time, it also requires us to reasonably manage the data and table spaces in the database. Sometimes, we need to delete a table space or a user. This article will introduce how to delete table spaces and users in Oracle database. 1. Delete table space In Oracle database, table space is a logical concept and can be simply understood as a collection of data files used to store data tables, indexes and other database objects. When we need to delete

May 13, 2023 pm 02:45 PM

oracle stored procedure execution sql

Stored procedures in Oracle database are precompiled programs that can greatly improve database operation efficiency and data security. Stored procedures allow users to encapsulate complex business logic into a callable code block for easy reuse. In the development of stored procedures, executing SQL statements is an essential operation. This article will introduce the methods and techniques of Oracle stored procedures to execute SQL statements. 1. Use static SQL statements to execute SQL. In stored procedures, the most basic way to execute SQL statements is to use static SQL statements. Static SQL

May 13, 2023 pm 02:44 PM

oracle select stored procedure

Oracle is one of the industry's leading relational database management systems (RDBMS) and is widely used in a variety of complex business applications. In Oracle, a stored procedure is a set of predefined SQL statements that are executed together as a single unit. Oracle select stored procedure is a common type of stored procedure, especially suitable for scenarios that need to be used in complex queries. The basic knowledge and implementation methods of Oracle select stored procedures will be introduced in detail below. 1. Introduction to stored procedures In Oracle, storage

May 13, 2023 pm 02:25 PM

oracle select stored procedure

Oracle is a relational database management system that has powerful features and flexibility to handle large amounts of data. In Oracle, a stored procedure is a reusable and maintainable database object. It is a set of predefined SQL statements that can be used to perform specific tasks. Among them, the select stored procedure is a special stored procedure that is used to query data in the database and return the results to the caller. In Oracle, the select stored procedure is written in PL/SQL language. PL/SQL is structured query language

May 13, 2023 pm 02:19 PM