How to select LAST line from a SAP table?

Hi developers,
I need to select the last line from a SAP table, NOT from an internal table.
Something like
SELECT SINGLE LAST FROM pa00169..
any help is more than welcome.

Javier,
Based on this statement from you:
"i created a Z table, its a config table that stores some bussines rules, and an id counter, so in order to update that counter i need the last line of the ztable."
I have one additional solution which is the "text box" approach IF the 'id counter' mentioned above is a numeric data type.
If so, use an SQL function to get the highest value of ID_COUNTER.
Then simply add one to it to produce a new, unique, higher-order primary key.
See below:
data: l_id_counter like ztable-id_counter.
data: new_id_counter like ztable-id_counter.
select max( ID_COUNTER ) from ztable into l_id_counter.
new_id_counter = l_i_counter + 1.
Now new_id_counter will be the unique, primary key IF this is the only field in ZTABLE's primary key.
This will also GUARANTEE that your new record is built correctly.

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CLEAR fieldcatalog.
fieldcatalog-fieldname = 'STATU'.
fieldcatalog-seltext_m = 'Status'.
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APPEND fieldcatalog TO fieldcatalog.
CLEAR fieldcatalog.
fieldcatalog-fieldname = 'MATNR'.
fieldcatalog-seltext_m = 'Material Number'.
APPEND fieldcatalog TO fieldcatalog.
CLEAR fieldcatalog.
fieldcatalog-fieldname = 'MENGE'.
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CLEAR fieldcatalog.
fieldcatalog-fieldname = 'MEINS'.
fieldcatalog-seltext_m = 'Order Unit'.
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 EXCEPTIONS
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FORM data_retrieval.
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 UP TO 10 ROWS
 FROM ekpo
 INTO CORRESPONDING FIELDS OF TABLE it_ekko.
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* --> R_UCOMM *
* --> RS_SELFIELD *
FORM user_command USING r_ucomm LIKE sy-ucomm
 rs_selfield TYPE slis_selfield.
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CASE r_ucomm.
 WHEN '&IC1'.
 IF rs_selfield-fieldname = 'EBELN'.
 READ TABLE it_ekko INTO wa_ekko INDEX rs_selfield-tabindex.
 SET PARAMETER ID 'BES' FIELD wa_ekko-ebeln.
 CALL TRANSACTION 'ME23N' AND SKIP FIRST SCREEN.
 ENDIF.
 WHEN 'DET'. "button add by me
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 REFRESH det_tab.
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 ENDLOOP.
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ENDCASE.
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* text
* -->RT_EXTAB text
FORM set_stat USING rt_extab TYPE slis_t_extab.
SET PF-STATUS 'ZSTAT' EXCLUDING rt_extab.
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fieldcatalog1-fieldname = 'EBELN'.
fieldcatalog1-tabname = 'DET_TAB'.
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fieldcatalog1-outputlen = 10.
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FORM dis_data.
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here i have copied standard gui status of ALV into my z status ZSTAT and add one button DET......
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