How to create a update function module

Go to transaction SE37 and Go to function groups and create a function group

And enter the funtion group name as below

 Click on Save button

Save as Local object are save under package.

 Now create a function module,enter the name as above

Give the function group name and click on save button.

Select the processing type as Update module

Use the above table in the update function module for updating the table

Add the tables parameterand exceptions like above

Add the above code in the update function module for update the table.