ABAP Select data from SAP table TZK02 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP TZK02 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 TZK02. 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 TZK02 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_TZK02 TYPE STANDARD TABLE OF TZK02,
      WA_TZK02 TYPE TZK02,
      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: <TZK02> TYPE TZK02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TZK02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TZK02
  INTO TABLE IT_TZK02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TZK02
*  INTO TABLE @DATA(IT_TZK022).
*--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_TZK02 INDEX 1 INTO DATA(WA_TZK022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TZK02 ASSIGNING <TZK02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TZK02>-MANDT = 1.
<TZK02>-RANTYP = 1.
<TZK02>-SKOGRP = 1.
<TZK02>-SKOART = 1.
<TZK02>-JMUSS = 1.

ENDLOOP.

LOOP AT IT_TZK02 INTO WA_TZK02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TZK02-JAUSBL, sy-vline,
  WA_TZK02-NFOLGE, sy-vline,
  WA_TZK02-NHIER, sy-vline,
  WA_TZK02-SBASIS, sy-vline,
  WA_TZK02-SZAWS, sy-vline,
  WA_TZK02-JNULLKON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TZK02 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_TZK02 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_TZK02 INTO WA_TZK02.


*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_TZK02_STR, 
MANDT TYPE STRING,
RANTYP TYPE STRING,
SKOGRP TYPE STRING,
SKOART TYPE STRING,
JMUSS TYPE STRING,
JAUSBL TYPE STRING,
NFOLGE TYPE STRING,
NHIER TYPE STRING,
SBASIS TYPE STRING,
SZAWS TYPE STRING,
JNULLKON TYPE STRING,
JBMONAT TYPE STRING,
SVULT TYPE STRING,
SFULT TYPE STRING,
SVKALRI TYPE STRING,
SFKALRI TYPE STRING,
AVGSTAGE TYPE STRING,
AFGSTAGE TYPE STRING,
SVKALZUS TYPE STRING,
SFKALZUS TYPE STRING,
SKALID TYPE STRING,
SZBMETH TYPE STRING,
JSOFVERR TYPE STRING,
SZEGEN TYPE STRING,
SBUST TYPE STRING,
SVWERK TYPE STRING,
SVMETH TYPE STRING,
SFWERK TYPE STRING,
SFMETH TYPE STRING,
SBERECH TYPE STRING,
SDWERK TYPE STRING,
SZWKEY TYPE STRING,
SZEITANT TYPE STRING,
SFANT TYPE STRING,
SINCL TYPE STRING,
JPROZR TYPE STRING,
PKOND TYPE STRING,
BKOND TYPE STRING,
SFRANZ TYPE STRING,
SFINCL TYPE STRING,
ZLSCH TYPE STRING,
JSAVEDEF TYPE STRING,
MANSP TYPE STRING,
ZAHLS TYPE STRING,
AVGSTAGEVZ TYPE STRING,
AFGSTAGEVZ TYPE STRING,
SBASFIX TYPE STRING,
JEXPOZINS TYPE STRING,
SROUND TYPE STRING,
SKALIDWT TYPE STRING,
JEXPOINTFACTOR TYPE STRING,
IND_IOAGP TYPE STRING,
SKOPO TYPE STRING,
AZGSTAGE TYPE STRING,
SZKALRI TYPE STRING,
GFZLSCH TYPE STRING,
AMMRHY TYPE STRING,
ATTRHY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TZK02_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_TZK02_STR-MANDT sy-vline 
WA_TZK02_STR-RANTYP sy-vline 
WA_TZK02_STR-SKOGRP sy-vline 
WA_TZK02_STR-SKOART sy-vline 
WA_TZK02_STR-JMUSS sy-vline 
WA_TZK02_STR-JAUSBL sy-vline 
WA_TZK02_STR-NFOLGE sy-vline 
WA_TZK02_STR-NHIER sy-vline 
WA_TZK02_STR-SBASIS sy-vline 
WA_TZK02_STR-SZAWS sy-vline 
WA_TZK02_STR-JNULLKON sy-vline 
WA_TZK02_STR-JBMONAT sy-vline 
WA_TZK02_STR-SVULT sy-vline 
WA_TZK02_STR-SFULT sy-vline 
WA_TZK02_STR-SVKALRI sy-vline 
WA_TZK02_STR-SFKALRI sy-vline 
WA_TZK02_STR-AVGSTAGE sy-vline 
WA_TZK02_STR-AFGSTAGE sy-vline 
WA_TZK02_STR-SVKALZUS sy-vline 
WA_TZK02_STR-SFKALZUS sy-vline 
WA_TZK02_STR-SKALID sy-vline 
WA_TZK02_STR-SZBMETH sy-vline 
WA_TZK02_STR-JSOFVERR sy-vline 
WA_TZK02_STR-SZEGEN sy-vline 
WA_TZK02_STR-SBUST sy-vline 
WA_TZK02_STR-SVWERK sy-vline 
WA_TZK02_STR-SVMETH sy-vline 
WA_TZK02_STR-SFWERK sy-vline 
WA_TZK02_STR-SFMETH sy-vline 
WA_TZK02_STR-SBERECH sy-vline 
WA_TZK02_STR-SDWERK sy-vline 
WA_TZK02_STR-SZWKEY sy-vline 
WA_TZK02_STR-SZEITANT sy-vline 
WA_TZK02_STR-SFANT sy-vline 
WA_TZK02_STR-SINCL sy-vline 
WA_TZK02_STR-JPROZR sy-vline 
WA_TZK02_STR-PKOND sy-vline 
WA_TZK02_STR-BKOND sy-vline 
WA_TZK02_STR-SFRANZ sy-vline 
WA_TZK02_STR-SFINCL sy-vline 
WA_TZK02_STR-ZLSCH sy-vline 
WA_TZK02_STR-JSAVEDEF sy-vline 
WA_TZK02_STR-MANSP sy-vline 
WA_TZK02_STR-ZAHLS sy-vline 
WA_TZK02_STR-AVGSTAGEVZ sy-vline 
WA_TZK02_STR-AFGSTAGEVZ sy-vline 
WA_TZK02_STR-SBASFIX sy-vline 
WA_TZK02_STR-JEXPOZINS sy-vline 
WA_TZK02_STR-SROUND sy-vline 
WA_TZK02_STR-SKALIDWT sy-vline 
WA_TZK02_STR-JEXPOINTFACTOR sy-vline 
WA_TZK02_STR-IND_IOAGP sy-vline 
WA_TZK02_STR-SKOPO sy-vline 
WA_TZK02_STR-AZGSTAGE sy-vline 
WA_TZK02_STR-SZKALRI sy-vline 
WA_TZK02_STR-GFZLSCH sy-vline 
WA_TZK02_STR-AMMRHY sy-vline 
WA_TZK02_STR-ATTRHY sy-vline      INTO ld_text SEPARATED BY SPACE.

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