ABAP Select data from SAP table /TMF/NFCREATION_ITEM_TAX_NFITE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /TMF/NFCREATION_ITEM_TAX_NFITE 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 /TMF/NFCREATION_ITEM_TAX_NFITE. 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 /TMF/NFCREATION_ITEM_TAX_NFITE 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_/TMF/NFCREATION_ITEM_TAX_NFITE TYPE STANDARD TABLE OF /TMF/NFCREATION_ITEM_TAX_NFITE,
      WA_/TMF/NFCREATION_ITEM_TAX_NFITE TYPE /TMF/NFCREATION_ITEM_TAX_NFITE,
      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: </TMF/NFCREATION_ITEM_TAX_NFITE> TYPE /TMF/NFCREATION_ITEM_TAX_NFITE.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /TMF/NFCREATION_ITEM_TAX_NFITE
  INTO TABLE IT_/TMF/NFCREATION_ITEM_TAX_NFITE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /TMF/NFCREATION_ITEM_TAX_NFITE
*  INTO TABLE @DATA(IT_/TMF/NFCREATION_ITEM_TAX_NFITE2).
*--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_/TMF/NFCREATION_ITEM_TAX_NFITE INDEX 1 INTO DATA(WA_/TMF/NFCREATION_ITEM_TAX_NFITE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/TMF/NFCREATION_ITEM_TAX_NFITE ASSIGNING </TMF/NFCREATION_ITEM_TAX_NFITE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</TMF/NFCREATION_ITEM_TAX_NFITE>-CONTROLLER = 1.
</TMF/NFCREATION_ITEM_TAX_NFITE>-DOCNUM = 1.
</TMF/NFCREATION_ITEM_TAX_NFITE>-ITMNUM = 1.
</TMF/NFCREATION_ITEM_TAX_NFITE>-TAXTYP = 1.
</TMF/NFCREATION_ITEM_TAX_NFITE>-BASE = 1.

ENDLOOP.

LOOP AT IT_/TMF/NFCREATION_ITEM_TAX_NFITE INTO WA_/TMF/NFCREATION_ITEM_TAX_NFITE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/TMF/NFCREATION_ITEM_TAX_NFITE-RATE, sy-vline,
  WA_/TMF/NFCREATION_ITEM_TAX_NFITE-TAXVAL, sy-vline,
  WA_/TMF/NFCREATION_ITEM_TAX_NFITE-EXCBAS, sy-vline,
  WA_/TMF/NFCREATION_ITEM_TAX_NFITE-OTHBAS, sy-vline,
  WA_/TMF/NFCREATION_ITEM_TAX_NFITE-STATTX, sy-vline,
  WA_/TMF/NFCREATION_ITEM_TAX_NFITE-RECTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/TMF/NFCREATION_ITEM_TAX_NFITE 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_/TMF/NFCREATION_ITEM_TAX_NFITE 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_/TMF/NFCREATION_ITEM_TAX_NFITE INTO WA_/TMF/NFCREATION_ITEM_TAX_NFITE.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_/TMF/NFCREATION_ITEM_TAX_NFITE_STR, 
CONTROLLER TYPE STRING,
DOCNUM TYPE STRING,
ITMNUM TYPE STRING,
TAXTYP TYPE STRING,
BASE TYPE STRING,
RATE TYPE STRING,
TAXVAL TYPE STRING,
EXCBAS TYPE STRING,
OTHBAS TYPE STRING,
STATTX TYPE STRING,
RECTYPE TYPE STRING,
FACTOR TYPE STRING,
UNIT TYPE STRING,
TAX_LOC TYPE STRING,
SERVTYPE_IN TYPE STRING,
SERVTYPE_OUT TYPE STRING,
WITHHOLD TYPE STRING,
TAXINNET TYPE STRING,
WHTCOLLCODE TYPE STRING,
RATE4DEC TYPE STRING,
BASERED1 TYPE STRING,
BASERED2 TYPE STRING,
FACTOR4DEC TYPE STRING,
UNIT4DEC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/TMF/NFCREATION_ITEM_TAX_NFITE_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_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-CONTROLLER sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-DOCNUM sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-ITMNUM sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-TAXTYP sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-BASE sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-RATE sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-TAXVAL sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-EXCBAS sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-OTHBAS sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-STATTX sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-RECTYPE sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-FACTOR sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-UNIT sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-TAX_LOC sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-SERVTYPE_IN sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-SERVTYPE_OUT sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-WITHHOLD sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-TAXINNET sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-WHTCOLLCODE sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-RATE4DEC sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-BASERED1 sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-BASERED2 sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-FACTOR4DEC sy-vline 
WA_/TMF/NFCREATION_ITEM_TAX_NFITE_STR-UNIT4DEC sy-vline      INTO ld_text SEPARATED BY SPACE.

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