How can Oracle replace field values in a table?

You can use the UPDATE statement to replace values in the table. Here is an example:

Assuming there is a table called employees, with columns employee_name and salary, we need to increase the salary of employees making less than 5000 by 10%.

UPDATE employees
SET salary = salary * 1.1
WHERE salary < 5000;

In the example mentioned above, an UPDATE statement is used to increase the salary field value by 10% for records in the employees table where the salary is less than 5000. Depending on the specific scenario, the WHERE and SET clauses can be modified to achieve different replacement field value purposes.