ABAP Select data from SAP table TAXCOM 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 TAXCOM 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 TAXCOM. 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 TAXCOM 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_TAXCOM TYPE STANDARD TABLE OF TAXCOM,
      WA_TAXCOM TYPE TAXCOM,
      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: <TAXCOM> TYPE TAXCOM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TAXCOM
*  INTO TABLE @DATA(IT_TAXCOM2).
*--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_TAXCOM INDEX 1 INTO DATA(WA_TAXCOM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TAXCOM>-BUKRS = 1.
<TAXCOM>-BUDAT = 1.
<TAXCOM>-BLDAT = 1.
<TAXCOM>-WAERS = 1.
<TAXCOM>-HWAER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TAXCOM-KPOSN, sy-vline,
  WA_TAXCOM-TAX_COUNTRY, sy-vline,
  WA_TAXCOM-MWSKZ, sy-vline,
  WA_TAXCOM-TXDAT, sy-vline,
  WA_TAXCOM-KOART, sy-vline,
  WA_TAXCOM-SHKZG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TAXCOM 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_TAXCOM 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_TAXCOM INTO WA_TAXCOM.


*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 AU132, internal->external for field WRBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_TAXCOM-WRBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TAXCOM-WRBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field WMWST
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_TAXCOM-WMWST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TAXCOM-WMWST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field WSKTO
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_TAXCOM-WSKTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TAXCOM-WSKTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field SKFBT
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_TAXCOM-SKFBT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TAXCOM-SKFBT.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TAXCOM-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TAXCOM-MEINS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSP, internal->external for field PROJK
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_TAXCOM-PROJK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TAXCOM-PROJK.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TAXCOM-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TAXCOM-KOSTL.
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_TAXCOM_STR, 
BUKRS TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
WAERS TYPE STRING,
HWAER TYPE STRING,
KPOSN TYPE STRING,
TAX_COUNTRY TYPE STRING,
MWSKZ TYPE STRING,
TXDAT TYPE STRING,
KOART TYPE STRING,
SHKZG TYPE STRING,
WRBTR TYPE STRING,
WMWST TYPE STRING,
WSKTO TYPE STRING,
SKFBT TYPE STRING,
ZBD1P TYPE STRING,
XMWST TYPE STRING,
TXJCD TYPE STRING,
MWART TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
EKORG TYPE STRING,
GSBER TYPE STRING,
LLIEF TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
BWTAR TYPE STRING,
MATKL TYPE STRING,
MEINS TYPE STRING,
MGLME TYPE STRING,
MTART TYPE STRING,
LAND1 TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
PROJK TYPE STRING,
PRCTR TYPE STRING,
AUFNR TYPE STRING,
KOSTL TYPE STRING,
KOKRS TYPE STRING,
BLART TYPE STRING,
NEBTR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TAXCOM_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_TAXCOM_STR-BUKRS sy-vline 
WA_TAXCOM_STR-BUDAT sy-vline 
WA_TAXCOM_STR-BLDAT sy-vline 
WA_TAXCOM_STR-WAERS sy-vline 
WA_TAXCOM_STR-HWAER sy-vline 
WA_TAXCOM_STR-KPOSN sy-vline 
WA_TAXCOM_STR-TAX_COUNTRY sy-vline 
WA_TAXCOM_STR-MWSKZ sy-vline 
WA_TAXCOM_STR-TXDAT sy-vline 
WA_TAXCOM_STR-KOART sy-vline 
WA_TAXCOM_STR-SHKZG sy-vline 
WA_TAXCOM_STR-WRBTR sy-vline 
WA_TAXCOM_STR-WMWST sy-vline 
WA_TAXCOM_STR-WSKTO sy-vline 
WA_TAXCOM_STR-SKFBT sy-vline 
WA_TAXCOM_STR-ZBD1P sy-vline 
WA_TAXCOM_STR-XMWST sy-vline 
WA_TAXCOM_STR-TXJCD sy-vline 
WA_TAXCOM_STR-MWART sy-vline 
WA_TAXCOM_STR-KUNNR sy-vline 
WA_TAXCOM_STR-LIFNR sy-vline 
WA_TAXCOM_STR-EKORG sy-vline 
WA_TAXCOM_STR-GSBER sy-vline 
WA_TAXCOM_STR-LLIEF sy-vline 
WA_TAXCOM_STR-MATNR sy-vline 
WA_TAXCOM_STR-WERKS sy-vline 
WA_TAXCOM_STR-BWTAR sy-vline 
WA_TAXCOM_STR-MATKL sy-vline 
WA_TAXCOM_STR-MEINS sy-vline 
WA_TAXCOM_STR-MGLME sy-vline 
WA_TAXCOM_STR-MTART sy-vline 
WA_TAXCOM_STR-LAND1 sy-vline 
WA_TAXCOM_STR-EBELN sy-vline 
WA_TAXCOM_STR-EBELP sy-vline 
WA_TAXCOM_STR-PROJK sy-vline 
WA_TAXCOM_STR-PRCTR sy-vline 
WA_TAXCOM_STR-AUFNR sy-vline 
WA_TAXCOM_STR-KOSTL sy-vline 
WA_TAXCOM_STR-KOKRS sy-vline 
WA_TAXCOM_STR-BLART sy-vline 
WA_TAXCOM_STR-NEBTR sy-vline      INTO ld_text SEPARATED BY SPACE.

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