Oracle中DBMS_SQL封装过程
DBMS_SQL封装过程中主要函数 1、OPEN_CURSOR:返回新游标的ID值 2、PARSE:解析要执行的语句 3、BIND_VARIABLE:将给定的数量与特
DBMS_SQL封装过程中主要函数
1、OPEN_CURSOR:返回新游标的ID值
2、PARSE:解析要执行的语句
3、BIND_VARIABLE:将给定的数量与特定的变量相连接
4、DEFINE_COLOUMN:定义字段变量,其值对应于指定游标中某个位置元素的值
(仅用于SELECT语句)
5、EXECUTE:执行指定的游标
6、EXECUTE_AND_FETCH:执行指定的游标并取记录
7、FETCH_ROWS:从指定的游标中取出记录
8、COLUMN_VALUE:返回游标中指定位置的元素
9、IS_OPEN:当指定的游标状态为OPEN时返回真值
10、CLOSE_CURSOR:关闭指定的游标并释放内存
11、LAST_ERROR_POSITION:返回出错SQL语句的字节偏移量
12、LAST_ROW_ID:返回最后一条记录的ROWID
13、LAST_SQL_FUNCTION_CODE:返回语句的SQL FUNCTION CODE
例1:
create or replace procedure LNQ (v_cardno varchar2, v_wdate datetime,v_wtime datetime)
is
vc1 NUMBER;
vi1 INTEGER;
vstr1 VARCHAR2(300);
BEGIN
-定义SQL命令
vstr1:='delete from emp where cardno=:cardno and wdate=:wdate and wtime=:wtime';
创建一个游标
vc1:=DBMS_SQL.OPEN_CURSOR;
向服务器发出一个语句并检查这个语句的语法和语义错误
DBMS_SQL.PARSE(vc1,vstr1,DBMS_SQL.V7);
assign parameter value
DBMS_SQL.BIND_VARIABLE(vc1,':cardno',v_cardno);
DBMS_SQL.BIND_VARIABLE(vc1,':wdate',v_wdate);
DBMS_SQL.BIND_VARIABLE(vc1,':wtime',v_wtime);
执行此语句,,因为执行的是查询,所以必须跟着Fetch_Rows函数并为单个行检索数据
vi1:=DBMS_SQL.EXECUTE(vc1);
关掉游标
DBMS_SQL.CLOSE_CURSOR(vc1);
END;

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

PrimeFactor−Innumbertheory,theprimefactorsofapositiveintegeraretheprimenumbersthatdividethatintegerexactly.Theprocessoffindingthesenumbersiscalledintegerfactorization,orprimefactorization.Example−Primefactorsof288are:288=2x2x2x2x2

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 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.

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.

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.

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.

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.

As the digital currency market booms, this article lists the top 10 digital currency trading apps to help investors choose reliable and easy-to-use platforms. Ranking lists include Binance, Coinbase, Gemini, Kraken, FTX, Huobi, OKX, Bitfinex, Crypto.com and Gate.io. These apps offer a wide range of trading pairs, a secure and reliable platform, low transaction fees and high liquidity. Investors should choose the app that best meets their needs based on factors such as security, user-friendliness, transaction fees, liquidity, supported currencies and customer service.
