ABAP Select data from SAP table VKONA into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VKONA table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to VKONA. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the VKONA table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_VKONA TYPE STANDARD TABLE OF VKONA,
      WA_VKONA TYPE VKONA,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <VKONA> TYPE VKONA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VKONA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VKONA
  INTO TABLE IT_VKONA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VKONA
*  INTO TABLE @DATA(IT_VKONA2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_VKONA INDEX 1 INTO DATA(WA_VKONA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VKONA ASSIGNING <VKONA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VKONA>-MANDT = 1.
<VKONA>-KNUMA = 1.
<VKONA>-VKORG = 1.
<VKONA>-VTWEG = 1.
<VKONA>-SPART = 1.

ENDLOOP.

LOOP AT IT_VKONA INTO WA_VKONA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VKONA-VKBUR, sy-vline,
  WA_VKONA-VKGRP, sy-vline,
  WA_VKONA-BOART, sy-vline,
  WA_VKONA-ABTYP, sy-vline,
  WA_VKONA-KAPPL, sy-vline,
  WA_VKONA-ERNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VKONA you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_VKONA TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_VKONA INTO WA_VKONA.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field KNUMA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKONA-KNUMA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKONA-KNUMA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BONEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKONA-BONEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKONA-BONEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BOLIF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKONA-BOLIF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKONA-BOLIF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field UKNUMA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKONA-UKNUMA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKONA-UKNUMA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AKTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKONA-AKTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKONA-AKTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKNUMA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKONA-VKNUMA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKONA-VKNUMA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BON_ENH_CNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKONA-BON_ENH_CNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKONA-BON_ENH_CNO.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_VKONA_STR, 
MANDT TYPE STRING,
KNUMA TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
VKBUR TYPE STRING,
VKGRP TYPE STRING,
BOART TYPE STRING,
ABTYP TYPE STRING,
KAPPL TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AEZET TYPE STRING,
BONEM TYPE STRING,
WAERS TYPE STRING,
MAXBO TYPE STRING,
ABREX TYPE STRING,
EKORG TYPE STRING,
BOLIF TYPE STRING,
ABSPZ TYPE STRING,
BOSTA TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
KOBOG TYPE STRING,
BOTEXT TYPE STRING,
ZLSCH TYPE STRING,
VALTG TYPE STRING,
VALDT TYPE STRING,
ZTERM TYPE STRING,
UKNUMA TYPE STRING,
IDENT1 TYPE STRING,
IDENT2 TYPE STRING,
UMNAM TYPE STRING,
UMSDA TYPE STRING,
UMSAE TYPE STRING,
EKGRP TYPE STRING,
AKTNR TYPE STRING,
ABEIN TYPE STRING,
BUKRS TYPE STRING,
VKNUMA TYPE STRING,
FORZP TYPE STRING,
FOART TYPE STRING,
IDENT3 TYPE STRING,
ABPAR TYPE STRING,
KFRST TYPE STRING,
ANGRP TYPE STRING,
ANBEDNFE TYPE STRING,
NAUMF_ENAW TYPE STRING,
NAUMF_SNAW TYPE STRING,
NAUMF_ANAW TYPE STRING,
UMSAEP TYPE STRING,
UMNAMP TYPE STRING,
UMSDAP TYPE STRING,
BON_ENH_VAKEY TYPE STRING,
BON_ENH_INDIRECT TYPE STRING,
BON_ENH_PERIOD_S TYPE STRING,
BON_ENH_CTYP TYPE STRING,
BON_ENH_CNO TYPE STRING,
BON_ENH_TTYP TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VKONA_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_VKONA_STR-MANDT sy-vline 
WA_VKONA_STR-KNUMA sy-vline 
WA_VKONA_STR-VKORG sy-vline 
WA_VKONA_STR-VTWEG sy-vline 
WA_VKONA_STR-SPART sy-vline 
WA_VKONA_STR-VKBUR sy-vline 
WA_VKONA_STR-VKGRP sy-vline 
WA_VKONA_STR-BOART sy-vline 
WA_VKONA_STR-ABTYP sy-vline 
WA_VKONA_STR-KAPPL sy-vline 
WA_VKONA_STR-ERNAM sy-vline 
WA_VKONA_STR-ERDAT sy-vline 
WA_VKONA_STR-ERZET sy-vline 
WA_VKONA_STR-AENAM sy-vline 
WA_VKONA_STR-AEDAT sy-vline 
WA_VKONA_STR-AEZET sy-vline 
WA_VKONA_STR-BONEM sy-vline 
WA_VKONA_STR-WAERS sy-vline 
WA_VKONA_STR-MAXBO sy-vline 
WA_VKONA_STR-ABREX sy-vline 
WA_VKONA_STR-EKORG sy-vline 
WA_VKONA_STR-BOLIF sy-vline 
WA_VKONA_STR-ABSPZ sy-vline 
WA_VKONA_STR-BOSTA sy-vline 
WA_VKONA_STR-DATAB sy-vline 
WA_VKONA_STR-DATBI sy-vline 
WA_VKONA_STR-KOBOG sy-vline 
WA_VKONA_STR-BOTEXT sy-vline 
WA_VKONA_STR-ZLSCH sy-vline 
WA_VKONA_STR-VALTG sy-vline 
WA_VKONA_STR-VALDT sy-vline 
WA_VKONA_STR-ZTERM sy-vline 
WA_VKONA_STR-UKNUMA sy-vline 
WA_VKONA_STR-IDENT1 sy-vline 
WA_VKONA_STR-IDENT2 sy-vline 
WA_VKONA_STR-UMNAM sy-vline 
WA_VKONA_STR-UMSDA sy-vline 
WA_VKONA_STR-UMSAE sy-vline 
WA_VKONA_STR-EKGRP sy-vline 
WA_VKONA_STR-AKTNR sy-vline 
WA_VKONA_STR-ABEIN sy-vline 
WA_VKONA_STR-BUKRS sy-vline 
WA_VKONA_STR-VKNUMA sy-vline 
WA_VKONA_STR-FORZP sy-vline 
WA_VKONA_STR-FOART sy-vline 
WA_VKONA_STR-IDENT3 sy-vline 
WA_VKONA_STR-ABPAR sy-vline 
WA_VKONA_STR-KFRST sy-vline 
WA_VKONA_STR-ANGRP sy-vline 
WA_VKONA_STR-ANBEDNFE sy-vline 
WA_VKONA_STR-NAUMF_ENAW sy-vline 
WA_VKONA_STR-NAUMF_SNAW sy-vline 
WA_VKONA_STR-NAUMF_ANAW sy-vline 
WA_VKONA_STR-UMSAEP sy-vline 
WA_VKONA_STR-UMNAMP sy-vline 
WA_VKONA_STR-UMSDAP sy-vline 
WA_VKONA_STR-BON_ENH_VAKEY sy-vline 
WA_VKONA_STR-BON_ENH_INDIRECT sy-vline 
WA_VKONA_STR-BON_ENH_PERIOD_S sy-vline 
WA_VKONA_STR-BON_ENH_CTYP sy-vline 
WA_VKONA_STR-BON_ENH_CNO sy-vline 
WA_VKONA_STR-BON_ENH_TTYP sy-vline 
WA_VKONA_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.