ABAP Select data from SAP table EMG_KNA1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EMG_KNA1 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 EMG_KNA1. 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 EMG_KNA1 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_EMG_KNA1 TYPE STANDARD TABLE OF EMG_KNA1,
      WA_EMG_KNA1 TYPE EMG_KNA1,
      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: <EMG_KNA1> TYPE EMG_KNA1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_EMG_KNA1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM EMG_KNA1
  INTO TABLE IT_EMG_KNA1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EMG_KNA1
*  INTO TABLE @DATA(IT_EMG_KNA12).
*--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_EMG_KNA1 INDEX 1 INTO DATA(WA_EMG_KNA12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_EMG_KNA1 ASSIGNING <EMG_KNA1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EMG_KNA1>-ANRED = 1.
<EMG_KNA1>-AUFSD = 1.
<EMG_KNA1>-BAHNE = 1.
<EMG_KNA1>-BAHNS = 1.
<EMG_KNA1>-BBBNR = 1.

ENDLOOP.

LOOP AT IT_EMG_KNA1 INTO WA_EMG_KNA1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EMG_KNA1-BBSNR, sy-vline,
  WA_EMG_KNA1-BEGRU_KNA1, sy-vline,
  WA_EMG_KNA1-BRSCH, sy-vline,
  WA_EMG_KNA1-BUBKZ, sy-vline,
  WA_EMG_KNA1-DATLT, sy-vline,
  WA_EMG_KNA1-ERDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EMG_KNA1 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_EMG_KNA1 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_EMG_KNA1 INTO WA_EMG_KNA1.


*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 FISKN_KNA1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EMG_KNA1-FISKN_KNA1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EMG_KNA1-FISKN_KNA1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNRZA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EMG_KNA1-KNRZA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EMG_KNA1-KNRZA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EMG_KNA1-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EMG_KNA1-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBUND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EMG_KNA1-VBUND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EMG_KNA1-VBUND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EMG_KNA1-EKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EMG_KNA1-EKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CFOPC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EMG_KNA1-CFOPC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EMG_KNA1-CFOPC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TXLW1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EMG_KNA1-TXLW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EMG_KNA1-TXLW1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TXLW2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EMG_KNA1-TXLW2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EMG_KNA1-TXLW2.
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_EMG_KNA1_STR, 
ANRED TYPE STRING,
AUFSD TYPE STRING,
BAHNE TYPE STRING,
BAHNS TYPE STRING,
BBBNR TYPE STRING,
BBSNR TYPE STRING,
BEGRU_KNA1 TYPE STRING,
BRSCH TYPE STRING,
BUBKZ TYPE STRING,
DATLT TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
EXABL TYPE STRING,
FAKSD TYPE STRING,
FISKN_KNA1 TYPE STRING,
KNAZK TYPE STRING,
KNRZA TYPE STRING,
KONZS TYPE STRING,
KTOKD TYPE STRING,
KUKLA TYPE STRING,
LIFNR TYPE STRING,
LIFSD TYPE STRING,
LOCCO TYPE STRING,
LOEVM TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
NIELS TYPE STRING,
ORT02 TYPE STRING,
PFACH TYPE STRING,
PSTL2 TYPE STRING,
COUNC_KNA1 TYPE STRING,
CITYC_KNA1 TYPE STRING,
RPMKR TYPE STRING,
SPERR TYPE STRING,
SPRAS TYPE STRING,
STCD1_KNA1 TYPE STRING,
STCD2_KNA1 TYPE STRING,
STKZA_KNA1 TYPE STRING,
STKZU_KNA1 TYPE STRING,
TELBX TYPE STRING,
TELF2 TYPE STRING,
TELTX TYPE STRING,
TELX1 TYPE STRING,
LZONE TYPE STRING,
XZEMP TYPE STRING,
VBUND TYPE STRING,
STCEG_KNA1 TYPE STRING,
DEAR1 TYPE STRING,
DEAR2 TYPE STRING,
DEAR3 TYPE STRING,
DEAR4 TYPE STRING,
DEAR5 TYPE STRING,
GFORM TYPE STRING,
BRAN1_KNA1 TYPE STRING,
BRAN2_KNA1 TYPE STRING,
BRAN3_KNA1 TYPE STRING,
BRAN4_KNA1 TYPE STRING,
BRAN5_KNA1 TYPE STRING,
EKONT TYPE STRING,
UMSAT TYPE STRING,
UMJAH TYPE STRING,
UWAER TYPE STRING,
JMZAH TYPE STRING,
JMJAH TYPE STRING,
KATR1 TYPE STRING,
KATR2 TYPE STRING,
KATR3 TYPE STRING,
KATR4 TYPE STRING,
KATR5 TYPE STRING,
KATR6 TYPE STRING,
KATR7 TYPE STRING,
KATR8 TYPE STRING,
KATR9 TYPE STRING,
KATR10 TYPE STRING,
STKZN TYPE STRING,
UMSA1 TYPE STRING,
TXJCD_KNA1 TYPE STRING,
PERIV TYPE STRING,
ABRVW TYPE STRING,
INSPBYDEBI TYPE STRING,
INSPATDEBI TYPE STRING,
KTOCD TYPE STRING,
PFORT TYPE STRING,
WERKS TYPE STRING,
DTAMS TYPE STRING,
DTAWS TYPE STRING,
DUEFL TYPE STRING,
HZUOR TYPE STRING,
SPERZ TYPE STRING,
ETIKG TYPE STRING,
CIVVE TYPE STRING,
MILVE TYPE STRING,
KDKG1 TYPE STRING,
KDKG2 TYPE STRING,
KDKG3 TYPE STRING,
KDKG4 TYPE STRING,
KDKG5 TYPE STRING,
XKNZA TYPE STRING,
FITYP TYPE STRING,
STCDT TYPE STRING,
STCD3 TYPE STRING,
STCD4 TYPE STRING,
XICMS TYPE STRING,
XXIPI TYPE STRING,
XSUBT TYPE STRING,
CFOPC TYPE STRING,
TXLW1 TYPE STRING,
TXLW2 TYPE STRING,
CCC01 TYPE STRING,
CCC02 TYPE STRING,
CCC03 TYPE STRING,
CCC04 TYPE STRING,
CASSD TYPE STRING,
KNURL TYPE STRING,
J_1KFREPRE TYPE STRING,
J_1KFTBUS TYPE STRING,
J_1KFTIND TYPE STRING,
NODEL_KNA1 TYPE STRING,
DEAR6 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EMG_KNA1_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_EMG_KNA1_STR-ANRED sy-vline 
WA_EMG_KNA1_STR-AUFSD sy-vline 
WA_EMG_KNA1_STR-BAHNE sy-vline 
WA_EMG_KNA1_STR-BAHNS sy-vline 
WA_EMG_KNA1_STR-BBBNR sy-vline 
WA_EMG_KNA1_STR-BBSNR sy-vline 
WA_EMG_KNA1_STR-BEGRU_KNA1 sy-vline 
WA_EMG_KNA1_STR-BRSCH sy-vline 
WA_EMG_KNA1_STR-BUBKZ sy-vline 
WA_EMG_KNA1_STR-DATLT sy-vline 
WA_EMG_KNA1_STR-ERDAT sy-vline 
WA_EMG_KNA1_STR-ERNAM sy-vline 
WA_EMG_KNA1_STR-EXABL sy-vline 
WA_EMG_KNA1_STR-FAKSD sy-vline 
WA_EMG_KNA1_STR-FISKN_KNA1 sy-vline 
WA_EMG_KNA1_STR-KNAZK sy-vline 
WA_EMG_KNA1_STR-KNRZA sy-vline 
WA_EMG_KNA1_STR-KONZS sy-vline 
WA_EMG_KNA1_STR-KTOKD sy-vline 
WA_EMG_KNA1_STR-KUKLA sy-vline 
WA_EMG_KNA1_STR-LIFNR sy-vline 
WA_EMG_KNA1_STR-LIFSD sy-vline 
WA_EMG_KNA1_STR-LOCCO sy-vline 
WA_EMG_KNA1_STR-LOEVM sy-vline 
WA_EMG_KNA1_STR-NAME3 sy-vline 
WA_EMG_KNA1_STR-NAME4 sy-vline 
WA_EMG_KNA1_STR-NIELS sy-vline 
WA_EMG_KNA1_STR-ORT02 sy-vline 
WA_EMG_KNA1_STR-PFACH sy-vline 
WA_EMG_KNA1_STR-PSTL2 sy-vline 
WA_EMG_KNA1_STR-COUNC_KNA1 sy-vline 
WA_EMG_KNA1_STR-CITYC_KNA1 sy-vline 
WA_EMG_KNA1_STR-RPMKR sy-vline 
WA_EMG_KNA1_STR-SPERR sy-vline 
WA_EMG_KNA1_STR-SPRAS sy-vline 
WA_EMG_KNA1_STR-STCD1_KNA1 sy-vline 
WA_EMG_KNA1_STR-STCD2_KNA1 sy-vline 
WA_EMG_KNA1_STR-STKZA_KNA1 sy-vline 
WA_EMG_KNA1_STR-STKZU_KNA1 sy-vline 
WA_EMG_KNA1_STR-TELBX sy-vline 
WA_EMG_KNA1_STR-TELF2 sy-vline 
WA_EMG_KNA1_STR-TELTX sy-vline 
WA_EMG_KNA1_STR-TELX1 sy-vline 
WA_EMG_KNA1_STR-LZONE sy-vline 
WA_EMG_KNA1_STR-XZEMP sy-vline 
WA_EMG_KNA1_STR-VBUND sy-vline 
WA_EMG_KNA1_STR-STCEG_KNA1 sy-vline 
WA_EMG_KNA1_STR-DEAR1 sy-vline 
WA_EMG_KNA1_STR-DEAR2 sy-vline 
WA_EMG_KNA1_STR-DEAR3 sy-vline 
WA_EMG_KNA1_STR-DEAR4 sy-vline 
WA_EMG_KNA1_STR-DEAR5 sy-vline 
WA_EMG_KNA1_STR-GFORM sy-vline 
WA_EMG_KNA1_STR-BRAN1_KNA1 sy-vline 
WA_EMG_KNA1_STR-BRAN2_KNA1 sy-vline 
WA_EMG_KNA1_STR-BRAN3_KNA1 sy-vline 
WA_EMG_KNA1_STR-BRAN4_KNA1 sy-vline 
WA_EMG_KNA1_STR-BRAN5_KNA1 sy-vline 
WA_EMG_KNA1_STR-EKONT sy-vline 
WA_EMG_KNA1_STR-UMSAT sy-vline 
WA_EMG_KNA1_STR-UMJAH sy-vline 
WA_EMG_KNA1_STR-UWAER sy-vline 
WA_EMG_KNA1_STR-JMZAH sy-vline 
WA_EMG_KNA1_STR-JMJAH sy-vline 
WA_EMG_KNA1_STR-KATR1 sy-vline 
WA_EMG_KNA1_STR-KATR2 sy-vline 
WA_EMG_KNA1_STR-KATR3 sy-vline 
WA_EMG_KNA1_STR-KATR4 sy-vline 
WA_EMG_KNA1_STR-KATR5 sy-vline 
WA_EMG_KNA1_STR-KATR6 sy-vline 
WA_EMG_KNA1_STR-KATR7 sy-vline 
WA_EMG_KNA1_STR-KATR8 sy-vline 
WA_EMG_KNA1_STR-KATR9 sy-vline 
WA_EMG_KNA1_STR-KATR10 sy-vline 
WA_EMG_KNA1_STR-STKZN sy-vline 
WA_EMG_KNA1_STR-UMSA1 sy-vline 
WA_EMG_KNA1_STR-TXJCD_KNA1 sy-vline 
WA_EMG_KNA1_STR-PERIV sy-vline 
WA_EMG_KNA1_STR-ABRVW sy-vline 
WA_EMG_KNA1_STR-INSPBYDEBI sy-vline 
WA_EMG_KNA1_STR-INSPATDEBI sy-vline 
WA_EMG_KNA1_STR-KTOCD sy-vline 
WA_EMG_KNA1_STR-PFORT sy-vline 
WA_EMG_KNA1_STR-WERKS sy-vline 
WA_EMG_KNA1_STR-DTAMS sy-vline 
WA_EMG_KNA1_STR-DTAWS sy-vline 
WA_EMG_KNA1_STR-DUEFL sy-vline 
WA_EMG_KNA1_STR-HZUOR sy-vline 
WA_EMG_KNA1_STR-SPERZ sy-vline 
WA_EMG_KNA1_STR-ETIKG sy-vline 
WA_EMG_KNA1_STR-CIVVE sy-vline 
WA_EMG_KNA1_STR-MILVE sy-vline 
WA_EMG_KNA1_STR-KDKG1 sy-vline 
WA_EMG_KNA1_STR-KDKG2 sy-vline 
WA_EMG_KNA1_STR-KDKG3 sy-vline 
WA_EMG_KNA1_STR-KDKG4 sy-vline 
WA_EMG_KNA1_STR-KDKG5 sy-vline 
WA_EMG_KNA1_STR-XKNZA sy-vline 
WA_EMG_KNA1_STR-FITYP sy-vline 
WA_EMG_KNA1_STR-STCDT sy-vline 
WA_EMG_KNA1_STR-STCD3 sy-vline 
WA_EMG_KNA1_STR-STCD4 sy-vline 
WA_EMG_KNA1_STR-XICMS sy-vline 
WA_EMG_KNA1_STR-XXIPI sy-vline 
WA_EMG_KNA1_STR-XSUBT sy-vline 
WA_EMG_KNA1_STR-CFOPC sy-vline 
WA_EMG_KNA1_STR-TXLW1 sy-vline 
WA_EMG_KNA1_STR-TXLW2 sy-vline 
WA_EMG_KNA1_STR-CCC01 sy-vline 
WA_EMG_KNA1_STR-CCC02 sy-vline 
WA_EMG_KNA1_STR-CCC03 sy-vline 
WA_EMG_KNA1_STR-CCC04 sy-vline 
WA_EMG_KNA1_STR-CASSD sy-vline 
WA_EMG_KNA1_STR-KNURL sy-vline 
WA_EMG_KNA1_STR-J_1KFREPRE sy-vline 
WA_EMG_KNA1_STR-J_1KFTBUS sy-vline 
WA_EMG_KNA1_STR-J_1KFTIND sy-vline 
WA_EMG_KNA1_STR-NODEL_KNA1 sy-vline 
WA_EMG_KNA1_STR-DEAR6 sy-vline      INTO ld_text SEPARATED BY SPACE.

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