ABAP Select data from SAP table PIQ_NL_DUOFEEDBACK_INDICATION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_NL_DUOFEEDBACK_INDICATION
*  INTO TABLE @DATA(IT_PIQ_NL_DUOFEEDBACK_INDICATION2).
*--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_PIQ_NL_DUOFEEDBACK_INDICATION INDEX 1 INTO DATA(WA_PIQ_NL_DUOFEEDBACK_INDICATION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_NL_DUOFEEDBACK_INDICATION>-CONTROLLER = 1.
<PIQ_NL_DUOFEEDBACK_INDICATION>-DUO_HEADER = 1.
<PIQ_NL_DUOFEEDBACK_INDICATION>-CONTROLLER = 1.
<PIQ_NL_DUOFEEDBACK_INDICATION>-DATA_KEY = 1.
<PIQ_NL_DUOFEEDBACK_INDICATION>-SEND_INST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_NL_DUOFEEDBACK_INDICATION-RECV_INST, sy-vline,
  WA_PIQ_NL_DUOFEEDBACK_INDICATION-DOC_DATE, sy-vline,
  WA_PIQ_NL_DUOFEEDBACK_INDICATION-CITS_NUM, sy-vline,
  WA_PIQ_NL_DUOFEEDBACK_INDICATION-EDU_NUM, sy-vline,
  WA_PIQ_NL_DUOFEEDBACK_INDICATION-DATE_DETERMINATION, sy-vline,
  WA_PIQ_NL_DUOFEEDBACK_INDICATION-DEC_TYPE_TUIFEE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_NL_DUOFEEDBACK_INDICATION 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_PIQ_NL_DUOFEEDBACK_INDICATION 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_PIQ_NL_DUOFEEDBACK_INDICATION INTO WA_PIQ_NL_DUOFEEDBACK_INDICATION.


*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_PIQ_NL_DUOFEEDBACK_INDICATION_STR, 
CONTROLLER TYPE STRING,
DUO_HEADER TYPE STRING,
CONTROLLER TYPE STRING,
DATA_KEY TYPE STRING,
SEND_INST TYPE STRING,
RECV_INST TYPE STRING,
DOC_DATE TYPE STRING,
CITS_NUM TYPE STRING,
EDU_NUM TYPE STRING,
DATE_DETERMINATION TYPE STRING,
DEC_TYPE_TUIFEE TYPE STRING,
CONTROLLER TYPE STRING,
TUIFEE_TYPE TYPE STRING,
IS_GRADE_HE TYPE STRING,
IS_GRADE_HOE TYPE STRING,
IS_GRADE_MAST TYPE STRING,
IS_GRADE_MAST_HOE TYPE STRING,
IS_FUNC_LIMIT_RIGHT_USED TYPE STRING,
NO_STUDY_YEAR TYPE STRING,
NO_STUDY_YEAR_HOE TYPE STRING,
NO_STUDY_YEAR_MAST TYPE STRING,
NO_STUDY_YEAR_MAST_HOE TYPE STRING,
NO_STAT_FEE_MON TYPE STRING,
RESIDENCE_REQ TYPE STRING,
CONTROLLER TYPE STRING,
IS_RES TYPE STRING,
STATE_CODE TYPE STRING,
NATIONALITY_REQ TYPE STRING,
CONTROLLER TYPE STRING,
IS_NATIONAL TYPE STRING,
BASIS_TUIFEE TYPE STRING,
CONTROLLER TYPE STRING,
FUNC_LIMIT TYPE STRING,
CONTROLLER TYPE STRING,
ALLOTMENT_DATE TYPE STRING,
EDU_RESULTS TYPE STRING,
EDU_PARTICIPATION TYPE STRING,
QUERIED_EDUPGM TYPE STRING,
CONTROLLER TYPE STRING,
IS_REG_HOE_Q TYPE STRING,
IS_REG_BOM_Q TYPE STRING,
EDU_PGM_Q TYPE STRING,
CONTROLLER TYPE STRING,
EDU_CODE_Q TYPE STRING,
EDU_NAME_SHORT_Q TYPE STRING,
EDU_NAME_LONG_Q TYPE STRING,
EDU_LEVEL_Q TYPE STRING,
CODE_DEFRAYMENT_Q TYPE STRING,
DUR_DEFRAYMENT_Q TYPE STRING,
EDU_SECTION_Q TYPE STRING,
EDU_FORM_Q TYPE STRING,
IS_TUIFEE_TOTAL TYPE STRING,
BRIN_NUM TYPE STRING,
EDU_CODE TYPE STRING,
EDU_FORM TYPE STRING,
REG_DATE TYPE STRING,
REG_NUM TYPE STRING,
TOTAL_LSF_MON TYPE STRING,
ERROR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_NL_DUOFEEDBACK_INDICATION_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_PIQ_NL_DUOFEEDBACK_INDICATION_STR-CONTROLLER sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-DUO_HEADER sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-CONTROLLER sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-DATA_KEY sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-SEND_INST sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-RECV_INST sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-DOC_DATE sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-CITS_NUM sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-EDU_NUM sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-DATE_DETERMINATION sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-DEC_TYPE_TUIFEE sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-CONTROLLER sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-TUIFEE_TYPE sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-IS_GRADE_HE sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-IS_GRADE_HOE sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-IS_GRADE_MAST sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-IS_GRADE_MAST_HOE sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-IS_FUNC_LIMIT_RIGHT_USED sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-NO_STUDY_YEAR sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-NO_STUDY_YEAR_HOE sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-NO_STUDY_YEAR_MAST sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-NO_STUDY_YEAR_MAST_HOE sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-NO_STAT_FEE_MON sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-RESIDENCE_REQ sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-CONTROLLER sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-IS_RES sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-STATE_CODE sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-NATIONALITY_REQ sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-CONTROLLER sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-IS_NATIONAL sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-BASIS_TUIFEE sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-CONTROLLER sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-FUNC_LIMIT sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-CONTROLLER sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-ALLOTMENT_DATE sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-EDU_RESULTS sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-EDU_PARTICIPATION sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-QUERIED_EDUPGM sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-CONTROLLER sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-IS_REG_HOE_Q sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-IS_REG_BOM_Q sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-EDU_PGM_Q sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-CONTROLLER sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-EDU_CODE_Q sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-EDU_NAME_SHORT_Q sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-EDU_NAME_LONG_Q sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-EDU_LEVEL_Q sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-CODE_DEFRAYMENT_Q sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-DUR_DEFRAYMENT_Q sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-EDU_SECTION_Q sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-EDU_FORM_Q sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-IS_TUIFEE_TOTAL sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-BRIN_NUM sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-EDU_CODE sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-EDU_FORM sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-REG_DATE sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-REG_NUM sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-TOTAL_LSF_MON sy-vline 
WA_PIQ_NL_DUOFEEDBACK_INDICATION_STR-ERROR sy-vline      INTO ld_text SEPARATED BY SPACE.

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