ABAP Select data from SAP table FKK_CRM_CORRHIST_DUN_ITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKK_CRM_CORRHIST_DUN_ITEM
*  INTO TABLE @DATA(IT_FKK_CRM_CORRHIST_DUN_ITEM2).
*--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_FKK_CRM_CORRHIST_DUN_ITEM INDEX 1 INTO DATA(WA_FKK_CRM_CORRHIST_DUN_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKK_CRM_CORRHIST_DUN_ITEM>-LAUFD = 1.
<FKK_CRM_CORRHIST_DUN_ITEM>-LAUFI = 1.
<FKK_CRM_CORRHIST_DUN_ITEM>-COTYP = 1.
<FKK_CRM_CORRHIST_DUN_ITEM>-COKEY = 1.
<FKK_CRM_CORRHIST_DUN_ITEM>-GPART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKK_CRM_CORRHIST_DUN_ITEM-VKONT, sy-vline,
  WA_FKK_CRM_CORRHIST_DUN_ITEM-VTREF, sy-vline,
  WA_FKK_CRM_CORRHIST_DUN_ITEM-AUSDT, sy-vline,
  WA_FKK_CRM_CORRHIST_DUN_ITEM-MDRKDC, sy-vline,
  WA_FKK_CRM_CORRHIST_DUN_ITEM-MAHNV, sy-vline,
  WA_FKK_CRM_CORRHIST_DUN_ITEM-MAHNS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKK_CRM_CORRHIST_DUN_ITEM 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_FKK_CRM_CORRHIST_DUN_ITEM 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_FKK_CRM_CORRHIST_DUN_ITEM INTO WA_FKK_CRM_CORRHIST_DUN_ITEM.


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

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

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

*Conversion exit ALPHA, internal->external for field MG1BL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKK_CRM_CORRHIST_DUN_ITEM-MG1BL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKK_CRM_CORRHIST_DUN_ITEM-MG1BL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MG2BL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKK_CRM_CORRHIST_DUN_ITEM-MG2BL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKK_CRM_CORRHIST_DUN_ITEM-MG2BL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MG3BL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKK_CRM_CORRHIST_DUN_ITEM-MG3BL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKK_CRM_CORRHIST_DUN_ITEM-MG3BL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NRZAS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKK_CRM_CORRHIST_DUN_ITEM-NRZAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKK_CRM_CORRHIST_DUN_ITEM-NRZAS.
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_FKK_CRM_CORRHIST_DUN_ITEM_STR, 
LAUFD TYPE STRING,
LAUFI TYPE STRING,
COTYP TYPE STRING,
COKEY TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
VTREF TYPE STRING,
AUSDT TYPE STRING,
MDRKDC TYPE STRING,
MAHNV TYPE STRING,
MAHNS TYPE STRING,
MAHNN TYPE STRING,
FAEDN TYPE STRING,
WAERS TYPE STRING,
MSALM TYPE STRING,
MGE1M TYPE STRING,
MG1BL TYPE STRING,
MG1TYTXT TYPE STRING,
MGE2M TYPE STRING,
MG2BL TYPE STRING,
MG2TYTXT TYPE STRING,
MGE3M TYPE STRING,
MG3BL TYPE STRING,
MG3TYTXT TYPE STRING,
XMSTO TYPE STRING,
NRZAS TYPE STRING,
MAHNVTXT TYPE STRING,
MAHNSTXT TYPE STRING,
MAHNNTXT TYPE STRING,
ICONR TYPE STRING,
DOCPATH TYPE STRING,
XURL TYPE STRING,
SUBAP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKK_CRM_CORRHIST_DUN_ITEM_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_FKK_CRM_CORRHIST_DUN_ITEM_STR-LAUFD sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-LAUFI sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-COTYP sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-COKEY sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-GPART sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-VKONT sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-VTREF sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-AUSDT sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MDRKDC sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MAHNV sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MAHNS sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MAHNN sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-FAEDN sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-WAERS sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MSALM sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MGE1M sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MG1BL sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MG1TYTXT sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MGE2M sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MG2BL sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MG2TYTXT sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MGE3M sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MG3BL sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MG3TYTXT sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-XMSTO sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-NRZAS sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MAHNVTXT sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MAHNSTXT sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-MAHNNTXT sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-ICONR sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-DOCPATH sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-XURL sy-vline 
WA_FKK_CRM_CORRHIST_DUN_ITEM_STR-SUBAP sy-vline      INTO ld_text SEPARATED BY SPACE.

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