Page 12-Oracle Programming Tutorials: Learn Oracle Online-php.cn

Article Tags

All
web3.0
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
Backend Development
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
Web Front-end
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
Database
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
Operation and Maintenance
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
Development Tools
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
PHP Framework
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
Common Problem
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
Other
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
Tech
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
CMS Tutorial
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
Java
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
System Tutorial
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
Computer Tutorials
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
Hardware Tutorial
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
Mobile Tutorial
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
Software Tutorial
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache
Mobile Game Tutorial
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
- NoSQL database
- Memcached
- cloudera
- memcache

Home

Technical Articles

Database

Oracle

What does oracle do

Oracle is the world's largest database management system (DBMS) software company. Its main products include the following functions: relational database management system (Oracle database) development tools (Oracle APEX, Oracle Visual Builder) middleware (Oracle WebLogic Server, Oracle SOA Suite) cloud service (Oracle Cloud Infrastructure) analysis and business intelligence (Oracle Analytics Cloud, Oracle Essbase) blockchain (Oracle Blockchain Pla

Apr 11, 2025 pm 06:06 PM

oracle 区块链 ai 敏感数据

The difference between database oracle and mysql

The main differences between Oracle and MySQL are licensing (Oracle is commercial, MySQL is open source), functionality (Oracle provides more advanced features), performance (Oracle is higher), availability (Oracle is higher), security and technical support (Oracle is more comprehensive). Oracle is suitable for enterprise-grade applications, MySQL is suitable for web applications, small and medium-sized enterprises, or on a limited budget.

Apr 11, 2025 pm 06:03 PM

mysql oracle 区别

What are the optimization strategies for Oracle database processes?

Strategies for optimizing Oracle database processes include: monitoring and analyzing process activities; adjusting process priorities; limiting the number of processes; using background processes; optimizing sorting and hashing operations; tuning I/O resources; using connection pools; and periodic cleaning and maintenance.

Apr 11, 2025 pm 06:00 PM

oracle

What is the oracle database security policy

Oracle database security policy is a set of rules to maintain database security, including: Authentication and authorization: Only authorized users are allowed to access the database. Data protection: Encryption, masking and other protection measures to prevent unauthorized access to data. Database object security: Controls access to database objects. Cybersecurity: Protect databases from cyberattacks. System Strengthening: Update patches and implement security audits. Backup and Recovery: Establish a data recovery policy. Safety awareness training: Provide safety awareness training. Continuous monitoring and auditing: Detect suspicious activity and vulnerabilities.

Apr 11, 2025 pm 05:57 PM

oracle

What are the strategies for handling errors in Oracle database?

The strategies for handling Oracle database errors include: checking error messages and obtaining the root cause of the problem; viewing log files to obtain more information; restarting the service or instance to resolve intermittent errors; repairing corrupted data blocks and solving data corruption problems; recompiling invalid objects to solve compile-time errors; analyzing performance problems and optimizing queries; contacting Oracle support department to obtain professional help; refer to online resources to find solutions.

Apr 11, 2025 pm 05:54 PM

oracle

How to achieve efficient data synchronization between Neo4j and PostgreSQL

Efficient data synchronization between Neo4j and PostgreSQL can be achieved through Apache Kafka, Debezium, Neo4j Bolt Connector, Neo4j APOC and other methods. These methods involve the following steps: Using Apache Kafka: utilizing its stream processing platform for real-time data synchronization, Neo4j as the source, and PostgreSQL as the receiver. Use Debezium: Used to capture PostgreSQL changes and convert them to CDC events and use Neo4j Connector to synchronize data to Neo4j. Using Neo4j

Apr 11, 2025 pm 05:51 PM

apache 处理器

Detailed explanation of nested query instances in MySQL database

Nested queries are a way to include another query in one query. They are mainly used to retrieve data that meets complex conditions, associate multiple tables, and calculate summary values or statistical information. Examples include finding employees above average wages, finding orders for a specific category, and calculating the total order volume for each product. When writing nested queries, you need to follow: write subqueries, write their results to outer queries (referenced with alias or AS clauses), and optimize query performance (using indexes).

Apr 11, 2025 pm 05:48 PM

mysql ai

Detailed explanation of Oracle database statistical information method

Oracle database statistics are metadata that optimizes query performance, and its collection methods include automatically collecting benchmark statistics and manually using the ANALYZE command. Statistics cover column data distribution, table data distribution, and index usage. The optimizer uses statistical information to determine the query execution plan, and uses histogram to estimate the number of result rows and predicate push to reduce the amount of data read. It is recommended to update statistics regularly, collect more detailed information for common tables, and monitor their collection and usage to ensure optimal performance.

Apr 11, 2025 pm 05:45 PM

oracle

How to add, modify and delete MySQL data table field operation guide

Field operation guide in MySQL: Add, modify, and delete fields. Add field: ALTER TABLE table_name ADD column_name data_type [NOT NULL] [DEFAULT default_value] [PRIMARY KEY] [AUTO_INCREMENT] Modify field: ALTER TABLE table_name MODIFY column_name data_type [NOT NULL] [DEFAULT default_value] [PRIMARY KEY]

Apr 11, 2025 pm 05:42 PM

mysql ai

How to add and replace hard disks in oracle rac

Oracle RAC hard disk new and replacement operations: Add hard disk: Add new disks, create ASM disk groups, add to clusters, move data files. Replace hard disk: Identify the failed hard disk, close the disk group, replace the hard disk, reopen the disk group, repair the failed disk, and move the data files.

Apr 11, 2025 pm 05:39 PM

oracle

Solution to MySQL encounters 'Access denied for user' problem

How to solve the MySQL "Access denied for user" error: 1. Check the user's permission to connect to the database; 2. Reset the password; 3. Allow remote connections; 4. Refresh permissions; 5. Check the database server configuration (bind-address, skip-grant-tables); 6. Check the firewall rules; 7. Restart the MySQL service. Tip: Make changes after backing up the database.

Apr 11, 2025 pm 05:36 PM

mysql access

Detailed explanation of the method of PostgreSQL to implement pivot table query

PostgreSQL pivot table query can group, aggregate and tabularize data, where cells display aggregate values. Implementation methods include: CROSS JOIN and GROUP BY: low efficiency, but high flexibility; GROUP BY CUBE/ROLLUP/GROUPSETS: high efficiency, but low flexibility.

Apr 11, 2025 pm 05:33 PM

Navicat's automatic backup of MySQL data

Steps to automatically back up MySQL data using Navicat: Install and connect to the MySQL server. Create a backup task, specifying the backup source, file location, and name. Configure backup options, including backup type, frequency, and retention time. Set up an automatic backup plan, enable automatic backup, set time and frequency. Preview the backup settings and perform the backup. Monitor backup progress and history.

Apr 11, 2025 pm 05:30 PM

mysql navicat

PostgreSQL WAL log bloat processing process

PostgreSQL WAL log bloat issue can be handled through regular cleaning. Specific steps include: checking the WAL log size; restoring or archiving the WAL logs; deleting old WAL logs that are no longer needed; enabling automatic cleaning; reducing the WAL partition (if using logical replication); regularly monitoring the WAL log size; ensuring sufficient disk space is available, regularly backing up the database, and understanding the potential impact of the cleanup operation.

Apr 11, 2025 pm 05:27 PM

数据丢失