I'm having some trouble trying to figure out how to Update a singular cell in a record using SQLPLUS. In a table called `CUSTOMER` I, the `CUSTOMER_NUMBER` column is not a Primary Key and is also a null value. I mistakenly made two of the `CUSTOMER NUMBER` values the same.

[![enter image description here](https://i.stack.imgur.com/AGa0a.png)](https://i.stack.imgur.com/AGa0a.png)

My question now, is there any way to `ALTER` and `UPDATE` a singular cell in a record? I need to change the `Adams` row to `412` instead of `522`.