ABAP Select data from SAP table TBZ0 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TBZ0 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 TBZ0. 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 TBZ0 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_TBZ0 TYPE STANDARD TABLE OF TBZ0,
      WA_TBZ0 TYPE TBZ0,
      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: <TBZ0> TYPE TBZ0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TBZ0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TBZ0
  INTO TABLE IT_TBZ0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TBZ0
*  INTO TABLE @DATA(IT_TBZ02).
*--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_TBZ0 INDEX 1 INTO DATA(WA_TBZ02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TBZ0 ASSIGNING <TBZ0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TBZ0>-CLIENT = 1.
<TBZ0>-OBJAP = 1.
<TBZ0>-RLTYP = 1.
<TBZ0>-VARNR = 1.
<TBZ0>-VARNS = 1.

ENDLOOP.

LOOP AT IT_TBZ0 INTO WA_TBZ0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TBZ0-DFTYP, sy-vline,
  WA_TBZ0-SCRSL, sy-vline,
  WA_TBZ0-XORGA, sy-vline,
  WA_TBZ0-XPERS, sy-vline,
  WA_TBZ0-XGROU, sy-vline,
  WA_TBZ0-XGLBL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TBZ0 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_TBZ0 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_TBZ0 INTO WA_TBZ0.


*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_TBZ0_STR, 
CLIENT TYPE STRING,
OBJAP TYPE STRING,
RLTYP TYPE STRING,
VARNR TYPE STRING,
VARNS TYPE STRING,
DFTYP TYPE STRING,
SCRSL TYPE STRING,
XORGA TYPE STRING,
XPERS TYPE STRING,
XGROU TYPE STRING,
XGLBL TYPE STRING,
RLTYP_SUPER TYPE STRING,
XPARTNER TYPE STRING,
XKUNNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TBZ0_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_TBZ0_STR-CLIENT sy-vline 
WA_TBZ0_STR-OBJAP sy-vline 
WA_TBZ0_STR-RLTYP sy-vline 
WA_TBZ0_STR-VARNR sy-vline 
WA_TBZ0_STR-VARNS sy-vline 
WA_TBZ0_STR-DFTYP sy-vline 
WA_TBZ0_STR-SCRSL sy-vline 
WA_TBZ0_STR-XORGA sy-vline 
WA_TBZ0_STR-XPERS sy-vline 
WA_TBZ0_STR-XGROU sy-vline 
WA_TBZ0_STR-XGLBL sy-vline 
WA_TBZ0_STR-RLTYP_SUPER sy-vline 
WA_TBZ0_STR-XPARTNER sy-vline 
WA_TBZ0_STR-XKUNNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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