How to schedule the execution of SQL statements in PL/SQL?

In PL/SQL, you can use the DBMS_SCHEDULER package to schedule the execution of SQL statements. Here is an example: 1. Create a PL/SQL procedure that contains the SQL statement you want to schedule for execution. For instance, create a procedure to insert a record into a table.

CREATE OR REPLACE PROCEDURE insert_record AS
BEGIN
  INSERT INTO your_table (column1, column2)
  VALUES ('value1', 'value2');
  COMMIT;
END;

Create a job using DBMS_SCHEDULER to define the time and frequency for scheduled execution. For instance, create a job to run the insert record process every day at 10 AM.

BEGIN

  DBMS_SCHEDULER.CREATE_JOB (
    job_name           => 'insert_record_job',
    job_type           => 'PLSQL_BLOCK',
    job_action         => 'BEGIN insert_record; END;',
    start_date         => SYSTIMESTAMP,
    repeat_interval    => 'FREQ=DAILY; BYHOUR=10',
    enabled            => TRUE);
END;

The repeat_interval parameter in the above code is used to define the frequency of job execution. In this example, the job will run once every day at 10 AM. 3. Enable the job:

BEGIN

  DBMS_SCHEDULER.ENABLE('insert_record_job');
END;

Once a job is enabled, scheduled execution will take effect. In addition to the examples mentioned above, DBMS_SCHEDULER also provides other more flexible scheduling options, such as specifying specific dates and times, adding repeat rules, defining intervals, etc. SQL statements for scheduled execution can be tailored according to specific needs.