ABAP Select data from SAP table VNKSK into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP VNKSK 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 VNKSK. 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 VNKSK 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_VNKSK TYPE STANDARD TABLE OF VNKSK,
      WA_VNKSK TYPE VNKSK,
      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: <VNKSK> TYPE VNKSK.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VNKSK
*  INTO TABLE @DATA(IT_VNKSK2).
*--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_VNKSK INDEX 1 INTO DATA(WA_VNKSK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VNKSK>-MANDT = 1.
<VNKSK>-BELNR = 1.
<VNKSK>-KSTYP = 1.
<VNKSK>-KSART = 1.
<VNKSK>-KSTYI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VNKSK-EINRI, sy-vline,
  WA_VNKSK-FALNR, sy-vline,
  WA_VNKSK-KOSTR, sy-vline,
  WA_VNKSK-LFDNR, sy-vline,
  WA_VNKSK-BSTAT, sy-vline,
  WA_VNKSK-GLOBZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VNKSK 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_VNKSK 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_VNKSK INTO WA_VNKSK.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VNKSK-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VNKSK-BELNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field ORGSP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VNKSK-ORGSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VNKSK-ORGSP.
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_VNKSK_STR, 
MANDT TYPE STRING,
BELNR TYPE STRING,
KSTYP TYPE STRING,
KSART TYPE STRING,
KSTYI TYPE STRING,
EINRI TYPE STRING,
FALNR TYPE STRING,
KOSTR TYPE STRING,
LFDNR TYPE STRING,
BSTAT TYPE STRING,
GLOBZ TYPE STRING,
ABGDT TYPE STRING,
BEGDT TYPE STRING,
ENDDT TYPE STRING,
UEBAB TYPE STRING,
ERSDT TYPE STRING,
VERKZ TYPE STRING,
VERDT TYPE STRING,
EMTYP TYPE STRING,
EBARB TYPE STRING,
EBZEI TYPE STRING,
MSPER TYPE STRING,
MAANZ TYPE STRING,
MADAT TYPE STRING,
REFBE TYPE STRING,
REFTY TYPE STRING,
KTEXT TYPE STRING,
LGTXT TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
STORN TYPE STRING,
STUSR TYPE STRING,
STDAT TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
KTXTP TYPE STRING,
LGTXP TYPE STRING,
ORGAB TYPE STRING,
ORGSP TYPE STRING,
BEHST TYPE STRING,
WAERS TYPE STRING,
DRUKZ TYPE STRING,
DRUDT TYPE STRING,
BEARB TYPE STRING,
TCODE TYPE STRING,
VRLNG TYPE STRING,
TELNR TYPE STRING,
FAXNR TYPE STRING,
LFDVOR TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VNKSK_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_VNKSK_STR-MANDT sy-vline 
WA_VNKSK_STR-BELNR sy-vline 
WA_VNKSK_STR-KSTYP sy-vline 
WA_VNKSK_STR-KSART sy-vline 
WA_VNKSK_STR-KSTYI sy-vline 
WA_VNKSK_STR-EINRI sy-vline 
WA_VNKSK_STR-FALNR sy-vline 
WA_VNKSK_STR-KOSTR sy-vline 
WA_VNKSK_STR-LFDNR sy-vline 
WA_VNKSK_STR-BSTAT sy-vline 
WA_VNKSK_STR-GLOBZ sy-vline 
WA_VNKSK_STR-ABGDT sy-vline 
WA_VNKSK_STR-BEGDT sy-vline 
WA_VNKSK_STR-ENDDT sy-vline 
WA_VNKSK_STR-UEBAB sy-vline 
WA_VNKSK_STR-ERSDT sy-vline 
WA_VNKSK_STR-VERKZ sy-vline 
WA_VNKSK_STR-VERDT sy-vline 
WA_VNKSK_STR-EMTYP sy-vline 
WA_VNKSK_STR-EBARB sy-vline 
WA_VNKSK_STR-EBZEI sy-vline 
WA_VNKSK_STR-MSPER sy-vline 
WA_VNKSK_STR-MAANZ sy-vline 
WA_VNKSK_STR-MADAT sy-vline 
WA_VNKSK_STR-REFBE sy-vline 
WA_VNKSK_STR-REFTY sy-vline 
WA_VNKSK_STR-KTEXT sy-vline 
WA_VNKSK_STR-LGTXT sy-vline 
WA_VNKSK_STR-ERDAT sy-vline 
WA_VNKSK_STR-ERUSR sy-vline 
WA_VNKSK_STR-STORN sy-vline 
WA_VNKSK_STR-STUSR sy-vline 
WA_VNKSK_STR-STDAT sy-vline 
WA_VNKSK_STR-UPDAT sy-vline 
WA_VNKSK_STR-UPUSR sy-vline 
WA_VNKSK_STR-KTXTP sy-vline 
WA_VNKSK_STR-LGTXP sy-vline 
WA_VNKSK_STR-ORGAB sy-vline 
WA_VNKSK_STR-ORGSP sy-vline 
WA_VNKSK_STR-BEHST sy-vline 
WA_VNKSK_STR-WAERS sy-vline 
WA_VNKSK_STR-DRUKZ sy-vline 
WA_VNKSK_STR-DRUDT sy-vline 
WA_VNKSK_STR-BEARB sy-vline 
WA_VNKSK_STR-TCODE sy-vline 
WA_VNKSK_STR-VRLNG sy-vline 
WA_VNKSK_STR-TELNR sy-vline 
WA_VNKSK_STR-FAXNR sy-vline 
WA_VNKSK_STR-LFDVOR sy-vline 
WA_VNKSK_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.