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Technical Articles

Database

Oracle

Is oracle a programming language?

No, Oracle is not a programming language. It is a database management system used to create and manage databases, but it provides a specialized programming language PL/SQL specific to database operations.

Apr 19, 2024 am 04:27 AM

mysql oracle python c++

Is oracle a programming language?

Oracle is not a programming language, but a database management system (DBMS) used to store and manage data. While Oracle provides customization capabilities, it lacks key features of programming languages such as variable declarations, control flow, and loops. It provides tools such as PL/SQL for creating custom applications on Oracle database.

Apr 19, 2024 am 04:24 AM

oracle

Can Oracle scheduled tasks be done at midnight every day?

Oracle scheduled tasks can be executed at 0:00 every morning through the DBMS_SCHEDULER package. The specific steps are as follows: Create a PL/SQL script file that contains the code to create the scheduled tasks; connect to the database as a DBA role and run the script file; the Oracle background process is executed at 0:00 in the morning. Poll the queue and execute the task.

Apr 19, 2024 am 04:18 AM

oracle

Is there a big difference between oracle and sqlserver?

The main differences between Oracle and SQL Server are: 1. Oracle uses a multi-process architecture, and SQL Server uses a multi-thread architecture; 2. Oracle uses lock-based concurrency control, and SQL Server uses version-based transaction isolation; 3. Oracle's database engine Suitable for processing large data sets, SQL Server's database engine is optimized for performance; 4. Oracle provides a wide range of data types, and SQL Server provides smaller but scalable data types; 5. Oracle uses B-tree-based indexes, and SQL Server uses unions Index; 6. Oracle provides more comprehensive security functions; 7

Apr 19, 2024 am 04:15 AM

oracle sqlserver

Is the oracle database from Microsoft?

No, Oracle Database is not owned by Microsoft. Oracle database is a relational database management system developed and maintained by Oracle Corporation, while Microsoft only develops software products such as Microsoft Windows operating system and Microsoft Office suite. Known for its high performance, scalability, and reliability, Oracle Database is widely used in enterprise applications such as e-commerce, supply chain management, and customer relationship management.

Apr 19, 2024 am 04:12 AM

oracle office

Is oracle database open source?

No, Oracle Database is not open source. Its source code is closed, and its use requires a commercial license from Oracle.

Apr 19, 2024 am 04:09 AM

mysql oracle

Is the oracle database mysql?

No, Oracle Database and MySQL Database are different database management systems. Oracle Database is known for its high performance, complex data model, and enterprise-grade capabilities, while MySQL focuses on cost-effectiveness, ease of use, and an active open source community. Therefore, they are suitable for different organizational needs and use cases.

Apr 19, 2024 am 04:06 AM

mysql oracle

Is the oracle database domestically produced?

Oracle database is a commercial database management system developed by Oracle Corporation in the United States. It is not domestically produced. Its intellectual property rights and source code belong to Oracle Corporation. There are many domestic database providers in China, such as Huawei Cloud GaussDB, Alibaba Cloud PolarDB and Tencent Cloud TDSQL.

Apr 19, 2024 am 04:03 AM

oracle 腾讯云

How to uninstall oracle database

Steps to uninstall Oracle database: Shut down the instance Back up the database Run the installer and select the complete removal mode Select the components to be uninstalled Uninstall Oracle clean the registry Manually remove the remaining files and folders

Apr 19, 2024 am 04:00 AM

oracle

How to back up tables in Oracle

Oracle provides several methods for backing up tables: Export utility: Exports the table and its data to a text file for later import and recovery. Import Utility: Import export files into the database, create or replace existing tables. Tablespace Import: Instantly restores the entire tablespace, including tables, indexes, and constraints. RMAN Backup Tables: Use Recovery Manager (RMAN) to back up tables, but it is more complex and time-consuming than other methods.

Apr 19, 2024 am 03:57 AM

oracle

How to authorize oracle

In an Oracle database, granting permissions controls user access. Here are the steps to grant permissions: Connect to the database. Determine the permissions to be granted (for example: SELECT, INSERT). Determine the objects to which permissions are to be granted (for example: tables, views). Grant permissions using a GRANT statement (for example: GRANT SELECT ON emp TO scott;). Commit the changes.

Apr 19, 2024 am 03:36 AM

oracle

How to recover accidentally deleted data in oracle

Methods to recover accidentally deleted data in Oracle include: Check the Recycle Bin: If the data is in the Recycle Bin, right-click and restore. Use Flashback Query: Execute a specific query to specify the timestamp of accidentally deleted data. Import using Data Pump: If you had a backup before accidentally deleting it, export the data and import it.

Apr 19, 2024 am 03:33 AM

oracle

How to restore database in oracle

There are three ways to recover an Oracle database: Using the RMAN utility: connect to the target database, perform a recovery operation, and then open the database. Use Flashback technology: Check the logs, determine the point in time, initiate a Flashback rollback, and open the database. Use Data Recovery Advisor: Launch the tool, select repair options, and follow the instructions in the wizard.

Apr 19, 2024 am 03:30 AM

oracle

How to roll back in oracle

The rollback operation in Oracle can undo the changes in uncommitted transactions and restore the database to the state before the transaction started. There are two methods of rollback: explicitly rolling back the current transaction using the ROLLBACK statement, or automatically rolling back the transaction when an error occurs through exception handling. Rollback can only undo changes in an uncommitted transaction, and the best practice is to use exception handling to handle errors in the transaction to ensure that the transaction is rolled back correctly when an error occurs.

Apr 19, 2024 am 03:27 AM

oracle