How to create function module to update z tables?

Hi,
I am new to ABAP. I checked the forum but did not find relevant solutions.
I have 2 z tables - ZFLIGHT and ZCUSTOMER. I have a few entries in each table.
I want to write a report to update the entries in the table using function modules. For that I have created a function module - zflight_fm and also a function group- zflight_fg and assigned the function group to the Fm. I do not know how to proceed further, what to put as import, export parameters, tables, changing etc. Further I want exceptions to handle the successful update of the entries.
Thanks and regards,
Smruthi

Steps:
1) Changing --->a) Zflight TYPE ZFLIGHT(DDIC Ref) OR Zflight TYPE ANY TABLE
                       b) ZCustomer TYPE ZFLIGHT(DDIC Ref) OR ZCustomer TYPE ANY TABLE
2) Execptions:
     a) Upload_failed_Flight
     b) Upload_Failed_Customer
3) Exporting ---> a) Information what rows are uploaded
Source Code:
Insert Zflight from Zflight(changing parameter).
If insert failed
RAISE Upload_failed_Flight.
endif.
Insert ZCustomer from ZCustomer(changing parameter).
If insert failed
RAISE Upload_failed_Customer.
endif.
Regards,
Gurpreet

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Message was edited by: Praveen

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