search
HomeDatabaseOracleoracle delete temporary table

oracle delete temporary table

May 11, 2023 pm 09:51 PM

When using Oracle database, it is often necessary to create temporary tables to process some temporary data, such as for report generation or data cleaning. However, temporary tables do not exist in memory like regular tables. They are usually temporary tables stored on disk, so they need to be cleaned up in time to free up disk space. This article will provide you with how to delete Oracle temporary tables.

1. What is Oracle temporary table?

Oracle's temporary table refers to the table created in our database to store temporary data. These tables are usually used to handle large amounts of data records for easy computer processing and storage. However, these tables are not permanent tables; they exist only as long as they are needed and can be deleted once the task is completed.

The main advantages of temporary tables are:

  1. Temporary tables can speed up data processing.
  2. Temporary tables do not occupy the permanent storage space of the database and reduce the proportion of database used space.
  3. When processing large amounts of data, temporary tables can save a lot of network traffic and disk IO overhead.

The disadvantages of using Oracle temporary tables are:

  1. Extensive use of temporary tables may put pressure on disk space.
  2. Temporary tables do not exist in memory, so they need to be cleaned up in time to release disk space.

2. Prerequisites for deleting Oracle temporary tables

Before you start deleting Oracle temporary tables, you should consider the following factors:

  1. Determine whether the current database user has sufficient permissions to delete temporary tables.
  2. Make sure that the table you want to delete is not currently in use or dependent on other objects.
  3. Confirm that the table you want to delete is a temporary table, not a regular table.

3. Oracle Delete Temporary Table Statement

If you are sure you want to delete the temporary table, you can use the following statement:

DROP TABLE ;

Among them, is the name of the temporary table to be deleted.

For example, assuming you want to delete a temporary table named temp_table, you can use the following statement:

DROP TABLE temp_table;

Before using this command, please make sure that you Have sufficient permissions and confirm whether the table to be deleted is a temporary table.

4. List all current temporary tables

You can use the following SQL command to list all current temporary tables:

SELECT table_name FROM user_tables WHERE temporary = 'Y ';

Using this command, you can check whether any temporary tables exist in the database and determine the name of the table to be deleted.

5. Comprehensive Example

Next, we will learn how to delete Oracle temporary tables through an example. Suppose we create the following temporary table in the database:

CREATE GLOBAL TEMPORARY TABLE temp_table (

id INT,
name VARCHAR2(100)

)
ON COMMIT DELETE ROWS;

Now, if you want to delete For this table, please use the following statement:

DROP TABLE temp_table;

Using this command will delete all temporary data stored in temp_table and release the occupied disk space.

Note: If your table is not a temporary table, using this command will delete the permanent table and cause irrecoverable damage on the target database.

6. Summary

Oracle temporary tables are a very useful feature when processing large amounts of data, but they need to be cleaned up in time to avoid putting pressure on disk space. This article introduces you how to delete Oracle temporary tables. I hope it will be helpful to you. Before using this command, be sure to carefully check the table you want to delete to avoid data loss.

The above is the detailed content of oracle delete temporary table. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
MySQL and Oracle: Key Differences in Features and FunctionalityMySQL and Oracle: Key Differences in Features and FunctionalityApr 18, 2025 am 12:15 AM

MySQL and Oracle each have advantages in performance, scalability, and security. 1) Performance: MySQL is suitable for read operations and high concurrency, and Oracle is good at complex queries and big data processing. 2) Scalability: MySQL extends through master-slave replication and sharding, and Oracle uses RAC to provide high availability and load balancing. 3) Security: MySQL provides fine-grained permission control, while Oracle has more comprehensive security functions and automation tools.

Oracle: The Powerhouse of Database ManagementOracle: The Powerhouse of Database ManagementApr 17, 2025 am 12:14 AM

Oracle is called the "Powerhouse" of database management because of its high performance, reliability and security. 1. Oracle is a relational database management system that supports multiple operating systems. 2. It provides a powerful data management platform with scalability, security and high availability. 3. Oracle's working principles include data storage, query processing and transaction management, and supports performance optimization technologies such as indexing, partitioning and caching. 4. Examples of usage include creating tables, inserting data, and writing stored procedures. 5. Performance optimization strategies include index optimization, partition table, cache management and query optimization.

What Does Oracle Offer? Products and Services ExplainedWhat Does Oracle Offer? Products and Services ExplainedApr 16, 2025 am 12:03 AM

Oracleoffersacomprehensivesuiteofproductsandservicesincludingdatabasemanagement,cloudcomputing,enterprisesoftware,andhardwaresolutions.1)OracleDatabasesupportsvariousdatamodelswithefficientmanagementfeatures.2)OracleCloudInfrastructure(OCI)providesro

Oracle Software: From Databases to the CloudOracle Software: From Databases to the CloudApr 15, 2025 am 12:09 AM

The development history of Oracle software from database to cloud computing includes: 1. Originated in 1977, it initially focused on relational database management system (RDBMS), and quickly became the first choice for enterprise-level applications; 2. Expand to middleware, development tools and ERP systems to form a complete set of enterprise solutions; 3. Oracle database supports SQL, providing high performance and scalability, suitable for small to large enterprise systems; 4. The rise of cloud computing services further expands Oracle's product line to meet all aspects of enterprise IT needs.

MySQL vs. Oracle: The Pros and ConsMySQL vs. Oracle: The Pros and ConsApr 14, 2025 am 12:01 AM

MySQL and Oracle selection should be based on cost, performance, complexity and functional requirements: 1. MySQL is suitable for projects with limited budgets, is simple to install, and is suitable for small to medium-sized applications. 2. Oracle is suitable for large enterprises and performs excellently in handling large-scale data and high concurrent requests, but is costly and complex in configuration.

Oracle's Purpose: Business Solutions and Data ManagementOracle's Purpose: Business Solutions and Data ManagementApr 13, 2025 am 12:02 AM

Oracle helps businesses achieve digital transformation and data management through its products and services. 1) Oracle provides a comprehensive product portfolio, including database management systems, ERP and CRM systems, helping enterprises automate and optimize business processes. 2) Oracle's ERP systems such as E-BusinessSuite and FusionApplications realize end-to-end business process automation, improve efficiency and reduce costs, but have high implementation and maintenance costs. 3) OracleDatabase provides high concurrency and high availability data processing, but has high licensing costs. 4) Performance optimization and best practices include the rational use of indexing and partitioning technology, regular database maintenance and compliance with coding specifications.

How to delete oracle library failureHow to delete oracle library failureApr 12, 2025 am 06:21 AM

Steps to delete the failed database after Oracle failed to build a library: Use sys username to connect to the target instance. Use DROP DATABASE to delete the database. Query v$database to confirm that the database has been deleted.

How to create cursors in oracle loopHow to create cursors in oracle loopApr 12, 2025 am 06:18 AM

In Oracle, the FOR LOOP loop can create cursors dynamically. The steps are: 1. Define the cursor type; 2. Create the loop; 3. Create the cursor dynamically; 4. Execute the cursor; 5. Close the cursor. Example: A cursor can be created cycle-by-circuit to display the names and salaries of the top 10 employees.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
Will R.E.P.O. Have Crossplay?
1 months agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)