ABAP Select data from SAP table PTW_FORM_TAXCERT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTW_FORM_TAXCERT
*  INTO TABLE @DATA(IT_PTW_FORM_TAXCERT2).
*--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_PTW_FORM_TAXCERT INDEX 1 INTO DATA(WA_PTW_FORM_TAXCERT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTW_FORM_TAXCERT>-PERNR = 1.
<PTW_FORM_TAXCERT>-BUKRS = 1.
<PTW_FORM_TAXCERT>-WERKS = 1.
<PTW_FORM_TAXCERT>-PERSG = 1.
<PTW_FORM_TAXCERT>-PERSK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTW_FORM_TAXCERT-BTRTL, sy-vline,
  WA_PTW_FORM_TAXCERT-ENTBD, sy-vline,
  WA_PTW_FORM_TAXCERT-ENTID, sy-vline,
  WA_PTW_FORM_TAXCERT-ENTAU, sy-vline,
  WA_PTW_FORM_TAXCERT-ENTXM, sy-vline,
  WA_PTW_FORM_TAXCERT-TFORM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTW_FORM_TAXCERT 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_PTW_FORM_TAXCERT 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_PTW_FORM_TAXCERT INTO WA_PTW_FORM_TAXCERT.


*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_PTW_FORM_TAXCERT_STR, 
PERNR TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
PERSG TYPE STRING,
PERSK TYPE STRING,
BTRTL TYPE STRING,
ENTBD TYPE STRING,
ENTID TYPE STRING,
ENTAU TYPE STRING,
ENTXM TYPE STRING,
TFORM TYPE STRING,
TAXID TYPE STRING,
IDTYP TYPE STRING,
EENUM TYPE STRING,
NACHN TYPE STRING,
VORNA TYPE STRING,
ADDRESS TYPE STRING,
TXPCT TYPE STRING,
GROSS TYPE STRING,
TAX TYPE STRING,
NET TYPE STRING,
PENSION_AMOUNT TYPE STRING,
COMPANY_NAME TYPE STRING,
COMPANY_ADDRESS TYPE STRING,
TWHDR TYPE STRING,
NAME TYPE STRING,
OVCHK TYPE STRING,
BEGDA1 TYPE STRING,
ENDDA1 TYPE STRING,
ADDTY TYPE STRING,
NATIO TYPE STRING,
ICNUM TYPE STRING,
STAT2 TYPE STRING,
ORGEH TYPE STRING,
INDVD TYPE STRING,
DMSTC TYPE STRING,
REMAK TYPE STRING,
HALFY TYPE STRING,
TXAGR TYPE STRING,
PAYDT TYPE STRING,
TAXID_D TYPE STRING,
TFORM1 TYPE STRING,
ENTBD1 TYPE STRING,
REPYEAR TYPE STRING,
BEGDA2 TYPE STRING,
TEXT_090 TYPE STRING,
TEXT_091 TYPE STRING,
TEXT_092 TYPE STRING,
TEXT_093 TYPE STRING,
TEXT_094 TYPE STRING,
TEXT_095 TYPE STRING,
TEXT_080 TYPE STRING,
TEXT_081 TYPE STRING,
TEXT_082 TYPE STRING,
TEXT_083 TYPE STRING,
TEXT_084 TYPE STRING,
TEXT_085 TYPE STRING,
TEXT_086 TYPE STRING,
TEXT_087 TYPE STRING,
TEXT_088 TYPE STRING,
TEXT_043 TYPE STRING,
TEXT_047 TYPE STRING,
TEXT_046 TYPE STRING,
TEXT_056 TYPE STRING,
ASTERISK1 TYPE STRING,
ASTERISK2 TYPE STRING,
ASTERISK3 TYPE STRING,
ASTERISK4 TYPE STRING,
ENDDA2 TYPE STRING,
ENTBD1_1 TYPE STRING,
ENTBD1_2 TYPE STRING,
ENTBD1_3 TYPE STRING,
ENTBD1_4 TYPE STRING,
ENTBD1_5 TYPE STRING,
ENTBD1_6 TYPE STRING,
ENTBD1_7 TYPE STRING,
ENTBD1_8 TYPE STRING,
ENTBD1_9 TYPE STRING,
ENTBD1_10 TYPE STRING,
ENTBD1_11 TYPE STRING,
ENTBD1_12 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTW_FORM_TAXCERT_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_PTW_FORM_TAXCERT_STR-PERNR sy-vline 
WA_PTW_FORM_TAXCERT_STR-BUKRS sy-vline 
WA_PTW_FORM_TAXCERT_STR-WERKS sy-vline 
WA_PTW_FORM_TAXCERT_STR-PERSG sy-vline 
WA_PTW_FORM_TAXCERT_STR-PERSK sy-vline 
WA_PTW_FORM_TAXCERT_STR-BTRTL sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTBD sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTID sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTAU sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTXM sy-vline 
WA_PTW_FORM_TAXCERT_STR-TFORM sy-vline 
WA_PTW_FORM_TAXCERT_STR-TAXID sy-vline 
WA_PTW_FORM_TAXCERT_STR-IDTYP sy-vline 
WA_PTW_FORM_TAXCERT_STR-EENUM sy-vline 
WA_PTW_FORM_TAXCERT_STR-NACHN sy-vline 
WA_PTW_FORM_TAXCERT_STR-VORNA sy-vline 
WA_PTW_FORM_TAXCERT_STR-ADDRESS sy-vline 
WA_PTW_FORM_TAXCERT_STR-TXPCT sy-vline 
WA_PTW_FORM_TAXCERT_STR-GROSS sy-vline 
WA_PTW_FORM_TAXCERT_STR-TAX sy-vline 
WA_PTW_FORM_TAXCERT_STR-NET sy-vline 
WA_PTW_FORM_TAXCERT_STR-PENSION_AMOUNT sy-vline 
WA_PTW_FORM_TAXCERT_STR-COMPANY_NAME sy-vline 
WA_PTW_FORM_TAXCERT_STR-COMPANY_ADDRESS sy-vline 
WA_PTW_FORM_TAXCERT_STR-TWHDR sy-vline 
WA_PTW_FORM_TAXCERT_STR-NAME sy-vline 
WA_PTW_FORM_TAXCERT_STR-OVCHK sy-vline 
WA_PTW_FORM_TAXCERT_STR-BEGDA1 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENDDA1 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ADDTY sy-vline 
WA_PTW_FORM_TAXCERT_STR-NATIO sy-vline 
WA_PTW_FORM_TAXCERT_STR-ICNUM sy-vline 
WA_PTW_FORM_TAXCERT_STR-STAT2 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ORGEH sy-vline 
WA_PTW_FORM_TAXCERT_STR-INDVD sy-vline 
WA_PTW_FORM_TAXCERT_STR-DMSTC sy-vline 
WA_PTW_FORM_TAXCERT_STR-REMAK sy-vline 
WA_PTW_FORM_TAXCERT_STR-HALFY sy-vline 
WA_PTW_FORM_TAXCERT_STR-TXAGR sy-vline 
WA_PTW_FORM_TAXCERT_STR-PAYDT sy-vline 
WA_PTW_FORM_TAXCERT_STR-TAXID_D sy-vline 
WA_PTW_FORM_TAXCERT_STR-TFORM1 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTBD1 sy-vline 
WA_PTW_FORM_TAXCERT_STR-REPYEAR sy-vline 
WA_PTW_FORM_TAXCERT_STR-BEGDA2 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_090 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_091 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_092 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_093 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_094 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_095 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_080 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_081 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_082 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_083 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_084 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_085 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_086 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_087 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_088 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_043 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_047 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_046 sy-vline 
WA_PTW_FORM_TAXCERT_STR-TEXT_056 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ASTERISK1 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ASTERISK2 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ASTERISK3 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ASTERISK4 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENDDA2 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTBD1_1 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTBD1_2 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTBD1_3 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTBD1_4 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTBD1_5 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTBD1_6 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTBD1_7 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTBD1_8 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTBD1_9 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTBD1_10 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTBD1_11 sy-vline 
WA_PTW_FORM_TAXCERT_STR-ENTBD1_12 sy-vline      INTO ld_text SEPARATED BY SPACE.

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