Fetch data from different database tables

Hi...
How can i fetch data from different database tables and put it into a internal table and then display it??? Can provide simple short codes as i'm new to ABAP. Thanks.

Hi,
Check this sample code..
TYPE-POOLS: slis.
DATA: BEGIN OF itab OCCURS 0,
 vbeln TYPE vbeln,
 expand,
 END OF itab.
DATA: BEGIN OF itab1 OCCURS 0,
 vbeln TYPE vbeln,
 posnr TYPE posnr,
 matnr TYPE matnr,
 netpr TYPE netpr,
 END OF itab1.
DATA: t_fieldcatalog TYPE slis_t_fieldcat_alv.
DATA: s_fieldcatalog TYPE slis_fieldcat_alv.
s_fieldcatalog-col_pos = '1'.
s_fieldcatalog-fieldname = 'VBELN'.
s_fieldcatalog-tabname = 'ITAB'.
s_fieldcatalog-rollname = 'VBELN'.
s_fieldcatalog-outputlen = '12'.
APPEND s_fieldcatalog TO t_fieldcatalog.
CLEAR: s_fieldcatalog.
s_fieldcatalog-col_pos = '1'.
s_fieldcatalog-fieldname = 'VBELN'.
s_fieldcatalog-tabname = 'ITAB1'.
s_fieldcatalog-rollname = 'VBELN'.
s_fieldcatalog-outputlen = '12'.
APPEND s_fieldcatalog TO t_fieldcatalog.
CLEAR: s_fieldcatalog.
s_fieldcatalog-col_pos = '2'.
s_fieldcatalog-fieldname = 'POSNR'.
s_fieldcatalog-tabname = 'ITAB1'.
s_fieldcatalog-rollname = 'POSNR'.
APPEND s_fieldcatalog TO t_fieldcatalog.
CLEAR: s_fieldcatalog.
s_fieldcatalog-col_pos = '3'.
s_fieldcatalog-fieldname = 'MATNR'.
s_fieldcatalog-tabname = 'ITAB1'.
s_fieldcatalog-rollname = 'MATNR'.
APPEND s_fieldcatalog TO t_fieldcatalog.
CLEAR: s_fieldcatalog.
s_fieldcatalog-col_pos = '4'.
s_fieldcatalog-fieldname = 'NETPR'.
s_fieldcatalog-tabname = 'ITAB1'.
s_fieldcatalog-rollname = 'NETPR'.
s_fieldcatalog-do_sum = 'X'.
APPEND s_fieldcatalog TO t_fieldcatalog.
CLEAR: s_fieldcatalog.
DATA: s_layout TYPE slis_layout_alv.
s_layout-subtotals_text = 'SUBTOTAL TEXT'.
s_layout-key_hotspot = 'X'.
s_layout-expand_fieldname = 'EXPAND'.
SELECT vbeln UP TO 100 ROWS
 FROM
 vbak
 INTO TABLE itab.
IF NOT itab[] IS INITIAL.
SELECT vbeln posnr matnr netpr
 FROM vbap
 INTO TABLE itab1
 FOR ALL ENTRIES IN itab
 WHERE vbeln = itab-vbeln.
ENDIF.
DATA: v_repid TYPE syrepid.
v_repid = sy-repid.
DATA: s_keyinfo TYPE slis_keyinfo_alv.
s_keyinfo-header01 = 'VBELN'.
s_keyinfo-item01 = 'VBELN'.
CALL FUNCTION 'REUSE_ALV_HIERSEQ_LIST_DISPLAY'
 EXPORTING
 i_callback_program = v_repid
 is_layout = s_layout
 it_fieldcat = t_fieldcatalog
 i_tabname_header = 'ITAB'
 i_tabname_item = 'ITAB1'
 is_keyinfo = s_keyinfo
 TABLES
 t_outtab_header = itab
 t_outtab_item = itab1
 EXCEPTIONS
 program_error = 1
 OTHERS = 2.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
Thanks
Naren

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hii
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c the SAPHELP docs...
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Effect
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>
Any alternative option other than SQL to fetch data from Oracle DAtabase. ( My manager worked on Mainframes he is telling other than SQL there should be some options.. Gents pls guide if any options.......
>
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