Structure and table both are 2/2 matrices but there are many differences between table and structure.
1. Table can store the data physically but a structure dose not store. 2. Table can have primary key but a structure dose not have. 3. Table can have the technical attribute but a structure dose not have.
End of the selection event is mostly used when we are writing HR-ABAP code. In the HR-ABAP code, data is retrieved in the start of selection event and printing on the list and all will be done at the end of the selection event.