Elementary search helps describe a search path. The elementary search help must define where the data of the hit list should be read from (selection method), how the exchange of values between the screen template and selection method is implemented (interface of the search help) and how the online input help should be defined (online behavior of the search help). 
Collective search help Combine several elementary search helps. A collective search help thus can offer several alternative search paths.
Elementry search helps are those which use only 1 table, whereas using collective we can use multiple tables.
The Steps:
Elementary Search Help
1) Goto SE11
Enter the search help name and click on create.
2) Choose elementary search help radio button option as the search help type.
3) Enter the search help parameters, the selection method and activate the search help.
Collective Search Help
1) Enter the search help name and click on create.
2) Choose Collective search help radio button option as the search help type.
3) Enter the search help parameters.
Note that there is no selection method to be entered for a collective search help.
4) Instead of the selection method, we enter the included search helps for the collective search help.
5)We need to assign parameters for each of the included search helps.
6) Complete the parameter assignment by clicking on the push button.
7) Collective search help offers the user to obtain F4 help using any of the included search helps.


Serkan AKKAVAK
Computer Engineer
ABAP Developer & SAP MM SD Consultant
Contact : serkurumsal@yandex.com