how to implement table editable of a cell

i want to edit any cell in table once edit is done it should update in the backend

This is such a broad question that I just recommend that you read the section on the Table component in the book, especially the sub-section about
editing the values in the table

How the data is written to a back-end depends on whether the table is directly bound to a back-end data source or not. Some container data sources allow item-level buffering, while others also container-level buffering. If you don’t use a bound data source, you have to copy the data to the back-end in your own code.