ABAP Select data from SAP table QSTRLIFNR 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 QSTRLIFNR 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 QSTRLIFNR. 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 QSTRLIFNR 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_QSTRLIFNR TYPE STANDARD TABLE OF QSTRLIFNR,
      WA_QSTRLIFNR TYPE QSTRLIFNR,
      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: <QSTRLIFNR> TYPE QSTRLIFNR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QSTRLIFNR
*  INTO TABLE @DATA(IT_QSTRLIFNR2).
*--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_QSTRLIFNR INDEX 1 INTO DATA(WA_QSTRLIFNR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QSTRLIFNR>-LIFNR = 1.
<QSTRLIFNR>-BUKRS = 1.
<QSTRLIFNR>-LAND1 = 1.
<QSTRLIFNR>-NAME1 = 1.
<QSTRLIFNR>-NAME2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QSTRLIFNR-NAME3, sy-vline,
  WA_QSTRLIFNR-NAME4, sy-vline,
  WA_QSTRLIFNR-ORT01, sy-vline,
  WA_QSTRLIFNR-ORT02, sy-vline,
  WA_QSTRLIFNR-PFACH, sy-vline,
  WA_QSTRLIFNR-PSTL2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QSTRLIFNR 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_QSTRLIFNR 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_QSTRLIFNR INTO WA_QSTRLIFNR.


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

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

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

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

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_QSTRLIFNR-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QSTRLIFNR-SPRAS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field FISKN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QSTRLIFNR-FISKN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QSTRLIFNR-FISKN.
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_QSTRLIFNR_STR, 
LIFNR TYPE STRING,
BUKRS TYPE STRING,
LAND1 TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
ORT01 TYPE STRING,
ORT02 TYPE STRING,
PFACH TYPE STRING,
PSTL2 TYPE STRING,
PSTLZ TYPE STRING,
REGIO TYPE STRING,
STRAS TYPE STRING,
HOUSE_NUM1 TYPE STRING,
HOUSE_NUM2 TYPE STRING,
HOUSE_NUM3 TYPE STRING,
ADRNR TYPE STRING,
ANRED TYPE STRING,
BAHNS TYPE STRING,
BBBNR TYPE STRING,
BBSNR TYPE STRING,
BRSCH TYPE STRING,
BUBKZ TYPE STRING,
DATLT TYPE STRING,
DTAMS TYPE STRING,
DTAWS TYPE STRING,
ESRNR TYPE STRING,
KONZS TYPE STRING,
KTOKK TYPE STRING,
KUNNR TYPE STRING,
LNRZA TYPE STRING,
SPERM TYPE STRING,
SPRAS TYPE STRING,
STCD1 TYPE STRING,
STCD2 TYPE STRING,
STKZA TYPE STRING,
STKZU TYPE STRING,
TELBX TYPE STRING,
TELF1 TYPE STRING,
TELF2 TYPE STRING,
TELFX TYPE STRING,
TELTX TYPE STRING,
TELX1 TYPE STRING,
XCPDK TYPE STRING,
VBUND TYPE STRING,
FISKN TYPE STRING,
STCEG TYPE STRING,
STKZN TYPE STRING,
GBORT TYPE STRING,
GBDAT TYPE STRING,
SEXKZ TYPE STRING,
KRAUS TYPE STRING,
QSSYS TYPE STRING,
KTOCK TYPE STRING,
PFORT TYPE STRING,
WERKS TYPE STRING,
TXJCD TYPE STRING,
STCD3 TYPE STRING,
STCD4 TYPE STRING,
PROFS TYPE STRING,
QLAND TYPE STRING,
QLTXT TYPE STRING,
BEZEI TYPE STRING,
LFDNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QSTRLIFNR_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_QSTRLIFNR_STR-LIFNR sy-vline 
WA_QSTRLIFNR_STR-BUKRS sy-vline 
WA_QSTRLIFNR_STR-LAND1 sy-vline 
WA_QSTRLIFNR_STR-NAME1 sy-vline 
WA_QSTRLIFNR_STR-NAME2 sy-vline 
WA_QSTRLIFNR_STR-NAME3 sy-vline 
WA_QSTRLIFNR_STR-NAME4 sy-vline 
WA_QSTRLIFNR_STR-ORT01 sy-vline 
WA_QSTRLIFNR_STR-ORT02 sy-vline 
WA_QSTRLIFNR_STR-PFACH sy-vline 
WA_QSTRLIFNR_STR-PSTL2 sy-vline 
WA_QSTRLIFNR_STR-PSTLZ sy-vline 
WA_QSTRLIFNR_STR-REGIO sy-vline 
WA_QSTRLIFNR_STR-STRAS sy-vline 
WA_QSTRLIFNR_STR-HOUSE_NUM1 sy-vline 
WA_QSTRLIFNR_STR-HOUSE_NUM2 sy-vline 
WA_QSTRLIFNR_STR-HOUSE_NUM3 sy-vline 
WA_QSTRLIFNR_STR-ADRNR sy-vline 
WA_QSTRLIFNR_STR-ANRED sy-vline 
WA_QSTRLIFNR_STR-BAHNS sy-vline 
WA_QSTRLIFNR_STR-BBBNR sy-vline 
WA_QSTRLIFNR_STR-BBSNR sy-vline 
WA_QSTRLIFNR_STR-BRSCH sy-vline 
WA_QSTRLIFNR_STR-BUBKZ sy-vline 
WA_QSTRLIFNR_STR-DATLT sy-vline 
WA_QSTRLIFNR_STR-DTAMS sy-vline 
WA_QSTRLIFNR_STR-DTAWS sy-vline 
WA_QSTRLIFNR_STR-ESRNR sy-vline 
WA_QSTRLIFNR_STR-KONZS sy-vline 
WA_QSTRLIFNR_STR-KTOKK sy-vline 
WA_QSTRLIFNR_STR-KUNNR sy-vline 
WA_QSTRLIFNR_STR-LNRZA sy-vline 
WA_QSTRLIFNR_STR-SPERM sy-vline 
WA_QSTRLIFNR_STR-SPRAS sy-vline 
WA_QSTRLIFNR_STR-STCD1 sy-vline 
WA_QSTRLIFNR_STR-STCD2 sy-vline 
WA_QSTRLIFNR_STR-STKZA sy-vline 
WA_QSTRLIFNR_STR-STKZU sy-vline 
WA_QSTRLIFNR_STR-TELBX sy-vline 
WA_QSTRLIFNR_STR-TELF1 sy-vline 
WA_QSTRLIFNR_STR-TELF2 sy-vline 
WA_QSTRLIFNR_STR-TELFX sy-vline 
WA_QSTRLIFNR_STR-TELTX sy-vline 
WA_QSTRLIFNR_STR-TELX1 sy-vline 
WA_QSTRLIFNR_STR-XCPDK sy-vline 
WA_QSTRLIFNR_STR-VBUND sy-vline 
WA_QSTRLIFNR_STR-FISKN sy-vline 
WA_QSTRLIFNR_STR-STCEG sy-vline 
WA_QSTRLIFNR_STR-STKZN sy-vline 
WA_QSTRLIFNR_STR-GBORT sy-vline 
WA_QSTRLIFNR_STR-GBDAT sy-vline 
WA_QSTRLIFNR_STR-SEXKZ sy-vline 
WA_QSTRLIFNR_STR-KRAUS sy-vline 
WA_QSTRLIFNR_STR-QSSYS sy-vline 
WA_QSTRLIFNR_STR-KTOCK sy-vline 
WA_QSTRLIFNR_STR-PFORT sy-vline 
WA_QSTRLIFNR_STR-WERKS sy-vline 
WA_QSTRLIFNR_STR-TXJCD sy-vline 
WA_QSTRLIFNR_STR-STCD3 sy-vline 
WA_QSTRLIFNR_STR-STCD4 sy-vline 
WA_QSTRLIFNR_STR-PROFS sy-vline 
WA_QSTRLIFNR_STR-QLAND sy-vline 
WA_QSTRLIFNR_STR-QLTXT sy-vline 
WA_QSTRLIFNR_STR-BEZEI sy-vline 
WA_QSTRLIFNR_STR-LFDNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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