Conversion method: 1. Use the to_char() function to output the time and date in the specified format. The result is a string, the syntax is "to_char(date,"conversion format")"; 2. Use to_date () function, syntax "to_date("time string","converted time and date format")".
The operating environment of this tutorial: Windows 7 system, Oracle 11g version, Dell G3 computer.
oracle time and date conversion into timestamp
In Oracle, there are two methods to convert time and date into timestamp:
to_char() function
to_date() function
##1. to_char()
Output the time and date in the specified format, and the result is a string, not a date type.to_char(日期,"转换格式" )will convert the given date according to the "conversion format". Example:
select to_char(sysdate, 'yyyy-mm-dd') from dual; select to_char(sysdate, 'yyyy/mm/dd') from dual; select to_char(sysdate, 'yyyymmdd') from dual; select to_char(sysdate, 'yyyymmdd hh24:mi:ss') from dual;You can also use to_char() to get a separate string of year, month, day, hour, minute and second
select to_char(sysdate,'yyyy') from dual; select to_char(sysdate,'mm') from dual; select to_char(sysdate,'hh24') from dual; select to_char(sysdate,'mi') from dual;
2, to_date()
Convert the string to the specified time and date formatto_date("时间字符串","转换的时间日期格式")The format of the two parameters must match, otherwise an error will be reported. That is, the first parameter is interpreted according to the format of the second parameter. Example:
select to_date('20220103','yyyymmdd') from dual; select to_date('20220103','yyyy-mm-dd') from dual; select to_date('20220103','yyyy/mm/dd') from dual; select to_date('20220103','yyyy-mm-dd hh24:mi:ss') from dual;Recommended tutorial: "
Oracle Tutorial"
The above is the detailed content of How to convert time date into timestamp in oracle. For more information, please follow other related articles on the PHP Chinese website!

Key features of Oracle software include multi-tenant architecture, advanced analytics and data mining, real-time application clustering (RAC), and automated management and monitoring. 1) A multi-tenant architecture allows for the management of multiple independent databases in one database instance, simplifying management and reducing costs. 2) Advanced analytics and data mining tools such as Oracle Advanced Analytics and OracleDataMining help extract insights from data. 3) Real-time application cluster (RAC) provides high availability and scalability, improving system fault tolerance and performance. 4) Automated management and monitoring tools such as Oracle EnterpriseManager (OEM) to automate daily maintenance tasks and monitor numbers in real time

Oracle has a profound impact in the fields of data management and enterprise applications. Its database is known for its reliability, scalability and security, and is widely used in industries such as finance, medical care and government. Oracle's influence has also expanded to middleware and cloud computing fields such as WebLogicServer and OracleCloudInfrastructure (OCI), providing innovative solutions. Despite the competition in the open source database and cloud computing market, Oracle maintains its leading position through continuous innovation.

Oracle's mission is to "help people see the value of data", and its core values include: 1) Customer first, 2) Integrity, 3) Innovation, and 4) Teamwork. These values guide Oracle's strategic decision-making and business innovation in the market.

Oracle Database is a relational database management system that supports SQL and object relational models to provide data security and high availability. 1. The core functions of Oracle database include data storage, retrieval, security and backup and recovery. 2. Its working principle involves multi-layer storage structure, MVCC mechanism and optimizer. 3. Basic usages include creating tables, inserting and querying data; advanced usages involve stored procedures and triggers. 4. Performance optimization strategies include the use of indexes, optimized SQL statements and memory management.

In addition to database management, Oracle software is also used in JavaEE applications, data grids and high-performance computing. 1. OracleWebLogicServer is used to deploy and manage JavaEE applications. 2. OracleCoherence provides high-performance data storage and caching services. 3. OracleExadata is used for high performance computing. These tools allow Oracle to play a more diversified role in the enterprise IT architecture.

Oracle is not only a database company, but also a leader in cloud computing and ERP systems. 1. Oracle provides comprehensive solutions from database to cloud services and ERP systems. 2. OracleCloud challenges AWS and Azure, providing IaaS, PaaS and SaaS services. 3. Oracle's ERP systems such as E-BusinessSuite and FusionApplications help enterprises optimize operations.

Oracle software applications in the real world include e-commerce platforms and manufacturing. 1) On e-commerce platforms, OracleDatabase is used to store and query user information. 2) In manufacturing, OracleE-BusinessSuite is used to optimize inventory and production planning.

The reason why Oracle software shines in multiple fields is its powerful application and customized solutions. 1) Oracle provides comprehensive solutions from database management to ERP, CRM, SCM, 2) its solutions can be customized according to industry characteristics such as finance, medical care, manufacturing, etc. 3) Successful cases include Citibank, Mayo Clinic and Toyota, 4) The advantages lie in comprehensiveness, customization and scalability, but challenges include complexity, cost and integration issues.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Zend Studio 13.0.1
Powerful PHP integrated development environment

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SublimeText3 Chinese version
Chinese version, very easy to use

Atom editor mac version download
The most popular open source editor
