How to Create Table Maintenance Generator?
Go to SE11, give the table name and click on change. Then Go to utilities--> Table maintenance generator.
In the table maintenance generator screen, we should give Authorization Group, Function Group name (Function Group name can be same as table name), Maintenance type can be one step or two step, usually we will create with one step. we should give maintenance screen number. After clicking on create button, a table maintenance generator will be created.
To check it go to SM30 . In SM30, we find display, Maintain options.
We can view the table contents by choosing Display and we can create table entries by choosing Maintain.
Read more here SAP ABAP Tutorial