Oracle中的双引号的作用
Oracle中的双引号的作用，建表时加双引号，会保留表名的大小写写入数据库，双引号没有写进数据库，而select时oracle会默认转成大
1.建表时加双引号，会保留表名的大小写写入数据库，
注意: 双引号没有写进数据库，而select时Oracle会默认转成大写去数据字典中查找，当然找不到啦
sys@ziling> conn scott/scott
2.双引号用在字符串中当成普通字符处理，且不一定要成对出现。
3.双引号用在to_char函数里的字符串中时，有特殊作用，，可以将特殊字符包起来，避免出现ORA-01821: date format not recognized错误。也就是说，去掉双引号和其包含的字符后，剩下的应该是一个合法的格式串。
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
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
C program to find the largest prime factor of a number
Aug 27, 2023 am 10:09 AM
PrimeFactor−Innumbertheory,theprimefactorsofapositiveintegeraretheprimenumbersthatdividethatintegerexactly.Theprocessoffindingthesenumbersiscalledintegerfactorization,orprimefactorization.Example−Primefactorsof288are:288=2x2x2x2x2
Top 10 Global Digital Virtual Currency Trading Platform Ranking (2025 Authoritative Ranking)
Mar 06, 2025 pm 04:36 PM
In 2025, global digital virtual currency trading platforms are fiercely competitive. This article authoritatively releases the top ten digital virtual currency trading platforms in the world in 2025 based on indicators such as transaction volume, security, and user experience. OKX ranks first with its strong technical strength and global operation strategy, and Binance follows closely with high liquidity and low fees. Platforms such as Gate.io, Coinbase, and Kraken are at the forefront with their respective advantages. The list covers trading platforms such as Huobi, KuCoin, Bitfinex, Crypto.com and Gemini, each with its own characteristics, but investment should be cautious. To choose a platform, you need to consider factors such as security, liquidity, fees, user experience, currency selection and regulatory compliance, and invest rationally
Top 10 exchanges in the currency circle in 2025 latest digital currency app rankings
Feb 27, 2025 pm 06:33 PM
Ranking of the top ten virtual currency trading platforms (latest in 2025): Binance: Global leader, high liquidity, and regulation has attracted attention. OKX: Large user base, supports multiple currencies, and provides leveraged trading. Gate.io: A senior exchange, with a variety of fiat currency payment methods, providing a variety of trading pairs and investment products. Bitget: Derivatives Exchange, high liquidity, low fees. Huobi: An old exchange that supports a variety of currencies and trading pairs. Coinbase: A well-known American exchange, strictly regulated. Phemex and so on.
Top 10 digital currency trading platforms The latest list of top 10 digital currency trading platforms
Mar 17, 2025 pm 05:57 PM
Top 10 digital currency trading platforms: 1. OKX, 2. Binance, 3. Gate.io, 4. Huobi Global, 5. Kraken, 6. Coinbase, 7. KuCoin, 8. Bitfinex, 9. Crypto.com, 10. Gemini, these exchanges have their own characteristics, and users can choose the platform that suits them based on factors such as security, fees, currency selection, user interface and customer support.
Top 10 trading platforms for digital currency apps, regular currency speculation platform app recommendations
Mar 07, 2025 pm 06:51 PM
This article recommends ten digital currency trading apps: 1. OKX; 2. Binance; 3. Gate.io; 4. Huobi Global; 5. Kraken; 6. Coinbase; 7. KuCoin; 8. Crypto.com; 9. Bitfinex; 10. Poloniex. When choosing a platform, you need to consider factors such as security, liquidity, transaction fees, currency selection, user interface, customer service support and regulatory compliance, and carefully evaluate risks and never blindly follow the trend.
What are the reliable digital currency platforms? Top 10 formal digital currency trading platforms 2025
Mar 17, 2025 pm 05:45 PM
Reliable digital currency platforms include: 1. OKX, 2. Binance, 3. Gate.io, 4. Huobi Global, 5. Kraken, 6. Coinbase, 7. KuCoin, 8. Bitfinex, 9. Crypto.com, 10. Gemini. These exchanges have their own characteristics. Users can choose the platform that suits them based on factors such as security, fees, currency selection, user interface and customer support.
The world's top ten virtual currency trading platform app genuine download and installation tutorial
Mar 12, 2025 pm 05:33 PM
This article provides Android and Apple mobile APP download methods for mainstream digital currency trading platforms such as Binance, OKX, Gate.io, Huobi Global, Coinbase, KuCoin, Kraken and Bitfinex. Whether it is an Android user or an Apple user, you can easily find the official APP download link for the corresponding platform and complete the installation according to the steps. The article provides detailed guidance on searching and downloading on their respective official websites or app stores, and provides instructions on the special steps for installing APK files on Android, so that users can download and use them quickly and easily.
Top 10 digital currency app trading platforms top10 virtual currency app 2025 rankings
Mar 13, 2025 pm 07:00 PM
The rankings of the top ten virtual currency trading platforms are: 1. OKX; 2. Binance; 3. Gate.io; 4. Huobi Global; 5. Kraken; 6. Coinbase; 7. KuCoin; 8. Crypto.com; 9. Bitfinex; 10. Gemini. The ranking is based on comprehensive considerations such as platform liquidity, currency selection, security, user experience, handling fees and compliance, but is for reference only. Investment should be cautious and at your own risk.
