How to write scheduled tasks in Oracle database

You can write Oracle database scheduled tasks through the following three methods: Use the DBMS_SCHEDULER package to create Scheduler stored procedures and jobs. Create credentials and jobs using the Oracle Scheduler service. Configure the job using Oracle Enterprise Manager Console.

How to write Oracle database scheduled tasks

Overview

Oracle The database provides a variety of options for creating and managing scheduled tasks. These tasks can automatically perform specific actions at specific times or intervals.

Method

1. Use the DBMS_SCHEDULER package

• Create a Scheduler stored procedure:

<code>CREATE PROCEDURE my_scheduler_proc AS
BEGIN
  -- 执行的任务内容
END;</code>

• Create a Scheduler job:

<code>BEGIN
  DBMS_SCHEDULER.CREATE_JOB(
    job_name          => 'my_job',
    job_type          => 'STORED_PROCEDURE',
    job_action        => 'my_scheduler_proc',
    start_date        => SYSDATE, -- 开始执行时间
    repeat_interval   => 'FREQ=DAILY', -- 重复频率
    end_date          => NULL, -- 结束时间
    enabled           => TRUE, -- 任务是否启用
    auto_drop         => FALSE, -- 任务完成后是否自动删除
    comments          => 'My Scheduled Task' -- 任务描述
  );
END;</code>

2. Use the Oracle Scheduler service

• Create credentials for the Scheduler service:

<code>CREATE USER scheduler IDENTIFIED BY password;
GRANT CREATE SESSION TO scheduler;
GRANT EXECUTE ON DBMS_SCHEDULER TO scheduler;</code>

• Create a job using the command line:

<code>srvctl add scheduler job -job_name my_job -program_name my_scheduler_proc -schedule 'FREQ=DAILY' -enabled yes -comments 'My Scheduled Task'</code>

3. Use Oracle Enterprise Manager Console

• Log in to Oracle Enterprise Manager Console.
• Navigate to "Scheduler".
• Click "New Job".
• Configure job details, including name, type, plan, operation, etc.

Each of the above methods creates a task that performs a specific action at a specified time. Oracle Database also records task execution history for easy monitoring and troubleshooting.

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