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Technical Articles

Database

Oracle

How to back up data in oracle database

Oracle database provides multiple methods to back up data: RMAN backup: use Recovery Manager (RMAN) for complete backup and recovery; EXP/IMP export and import: export and import data, suitable for small to medium-sized databases; database replication: create a database copy , keep the copy synchronized with the source database to ensure high availability; data pump export and import: backup and recovery are fast, but the functionality may be limited; logical backup: create data structure and text representation of the data.

Apr 07, 2024 pm 04:54 PM

oracle

How to query oracle database logs

Oracle database log information can be queried by the following methods: Use SQL statements to query from the v$log view; use the LogMiner tool to analyze log files; use the ALTER SYSTEM command to view the status of the current log file; use the TRACE command to view information about specific events; use operations System tools look at the end of the log file.

Apr 07, 2024 pm 04:51 PM

oracle linux sql statement

How to pass parameters to Oracle database trigger

Oracle database triggers can accept parameters for increased flexibility. There are two ways to pass parameters: 1. Direct assignment: declare parameters in the trigger definition and use name access in the trigger code; 2. Use pragma autonomous_transaction: use pragma in the trigger definition and use autonomous_transaction in the trigger code. Function access parameters.

Apr 07, 2024 pm 04:48 PM

oracle

How to restart oracle database trigger

To restart Oracle database triggers, follow these steps: Disable triggers: ALTER TRIGGER <trigger_name> DISABLE; Enable triggers: ALTER TRIGGER <trigger_name> ENABLE;

Apr 07, 2024 pm 04:45 PM

oracle

How to activate oracle database trigger

Oracle database triggers activate on DDL (such as CREATE, ALTER) or DML (such as INSERT, UPDATE, DELETE) operations: DDL operations activate triggers defined on the underlying table. DML operations activate triggers defined on the underlying table.

Apr 07, 2024 pm 04:42 PM

oracle

How to run sql in oracle database

The steps to run SQL statements in an Oracle database include: Open the SQL Plus tool and connect to the database. Enter the SQL statement at the prompt. Press Enter to run the statement. View results, error messages, or exit SQL Plus.

Apr 07, 2024 pm 04:39 PM

oracle

How to write trigger in oracle database

Oracle triggers are database objects that automatically perform actions when a specific event occurs in a table, such as inserting, updating, or deleting a record. To create a trigger, use the syntax CREATE TRIGGER <trigger name>ON <table name>FOR <event>ASBEGIN <action>END;. Triggers can insert, update, or delete records in another table, call procedures or functions, and execute user-defined code.

Apr 07, 2024 pm 04:36 PM

oracle

How to check the oracle database listening port

To view the Oracle database listening port, follow these steps: Connect to the database server and find the listener process. Identifies the port number the listener process is listening on. Use the lsnrctl status command to list listener details, including port number, status, and number of connections.

Apr 07, 2024 pm 04:33 PM

oracle linux

How to start oracle data monitoring

Steps to start a data listener in Oracle: Check the current status: lsnrctl status Start: lsnrctl start Enable automatic start: lsnrctl set auto_start true Verify the startup status: lsnrctl status Check the log file (/u01/app/oracle/product/<oracle_home> /server/tnsnames.ora) for error messages.

Apr 07, 2024 pm 04:30 PM

oracle

How to read the oracle database instance name

Method to view the Oracle database instance name: SQL command: SELECT INSTANCE_NAME FROM V$INSTANCE; Operating system command: Unix/Linux execute ps -ef | grep -i ora_pmon; Windows View Task Manager starts with "ora_pmon" or "OracleXXX" Process properties; Oracle Enterprise Manager: Log in to the console, navigate to Database > Instance, and view the Name column.

Apr 07, 2024 pm 04:27 PM

oracle linux

What features does oracle have?

Oracle database is known for its scalability, reliability, performance, security, high availability, ease of use, portability and other features. Its scalability supports large amounts of data and transactions, reliability ensures data integrity, advanced technology optimizes query performance, multi-layered security protects data security, replication and failover technology enables high availability, and intuitive interface and command line tools simplify management, available at Running on multiple platforms provides flexibility.

Apr 07, 2024 pm 04:24 PM

oracle linux

What language is used in oracle database?

Oracle database uses PL/SQL language, whose features include process orientation, SQL integration, data processing, exception handling and portability. PL/SQL can be used to create stored procedures, triggers, packages, reports and perform data validation and manipulation.

Apr 07, 2024 pm 04:18 PM

oracle

What does oracle database mean?

Oracle Database is a relational database management system known for its high performance, scalability, data reliability, advanced security features, and extensive feature set. It is widely used in e-commerce, finance, healthcare, manufacturing, and retail industries.

Apr 07, 2024 pm 04:15 PM

oracle linux macos Sensitive data

Where can I find Oracle scheduled tasks?

Check the scheduled tasks in the Oracle database: 1. Query the DBA_SCHEDULER_JOBS view to obtain the task name, plan and other information; 2. Use the DBMS_SCHEDULER.LIST_JOBS function to return the same result set as the view.

Apr 07, 2024 pm 04:09 PM

oracle