ABAP Select data from SAP table KUNDE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KUNDE
*  INTO TABLE @DATA(IT_KUNDE2).
*--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_KUNDE INDEX 1 INTO DATA(WA_KUNDE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KUNDE>-MATNR = 1.
<KUNDE>-WERKS = 1.
<KUNDE>-CHARG = 1.
<KUNDE>-SOBKZ = 1.
<KUNDE>-KUNNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KUNDE-LFGJA, sy-vline,
  WA_KUNDE-LFMON, sy-vline,
  WA_KUNDE-KUSPR, sy-vline,
  WA_KUNDE-KULAB, sy-vline,
  WA_KUNDE-KUINS, sy-vline,
  WA_KUNDE-KUVLA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KUNDE 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_KUNDE 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_KUNDE INTO WA_KUNDE.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_KUNDE-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KUNDE-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field LFGJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_KUNDE-LFGJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KUNDE-LFGJA.
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_KUNDE_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
KUNNR TYPE STRING,
LFGJA TYPE STRING,
LFMON TYPE STRING,
KUSPR TYPE STRING,
KULAB TYPE STRING,
KUINS TYPE STRING,
KUVLA TYPE STRING,
KUVIN TYPE STRING,
KUILL TYPE STRING,
KUILQ TYPE STRING,
KUVLL TYPE STRING,
KUVLQ TYPE STRING,
KUFLL TYPE STRING,
KUFLQ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KUNDE_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_KUNDE_STR-MATNR sy-vline 
WA_KUNDE_STR-WERKS sy-vline 
WA_KUNDE_STR-CHARG sy-vline 
WA_KUNDE_STR-SOBKZ sy-vline 
WA_KUNDE_STR-KUNNR sy-vline 
WA_KUNDE_STR-LFGJA sy-vline 
WA_KUNDE_STR-LFMON sy-vline 
WA_KUNDE_STR-KUSPR sy-vline 
WA_KUNDE_STR-KULAB sy-vline 
WA_KUNDE_STR-KUINS sy-vline 
WA_KUNDE_STR-KUVLA sy-vline 
WA_KUNDE_STR-KUVIN sy-vline 
WA_KUNDE_STR-KUILL sy-vline 
WA_KUNDE_STR-KUILQ sy-vline 
WA_KUNDE_STR-KUVLL sy-vline 
WA_KUNDE_STR-KUVLQ sy-vline 
WA_KUNDE_STR-KUFLL sy-vline 
WA_KUNDE_STR-KUFLQ sy-vline      INTO ld_text SEPARATED BY SPACE.

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