ABAP Select data from SAP table T521B into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T521B 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 T521B. 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 T521B 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_T521B TYPE STANDARD TABLE OF T521B,
      WA_T521B TYPE T521B,
      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: <T521B> TYPE T521B.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T521B.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T521B
  INTO TABLE IT_T521B.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T521B
*  INTO TABLE @DATA(IT_T521B2).
*--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_T521B INDEX 1 INTO DATA(WA_T521B2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T521B ASSIGNING <T521B>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T521B>-MANDT = 1.
<T521B>-EMFSL = 1.
<T521B>-ENDDA = 1.
<T521B>-BEGDA = 1.
<T521B>-EMFNA = 1.

ENDLOOP.

LOOP AT IT_T521B INTO WA_T521B.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T521B-PSTLZ, sy-vline,
  WA_T521B-ORT01, sy-vline,
  WA_T521B-BANKS, sy-vline,
  WA_T521B-BANKL, sy-vline,
  WA_T521B-BKKTO, sy-vline,
  WA_T521B-USBKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T521B 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_T521B 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_T521B INTO WA_T521B.


*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_T521B_STR, 
MANDT TYPE STRING,
EMFSL TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
EMFNA TYPE STRING,
PSTLZ TYPE STRING,
ORT01 TYPE STRING,
BANKS TYPE STRING,
BANKL TYPE STRING,
BKKTO TYPE STRING,
USBKZ TYPE STRING,
ZLSCH TYPE STRING,
STRAS TYPE STRING,
TELNR TYPE STRING,
ETEXT TYPE STRING,
CTRAN TYPE STRING,
PSKTO TYPE STRING,
PBSNR TYPE STRING,
TRANS TYPE STRING,
BKONT TYPE STRING,
BTTYP TYPE STRING,
ESRNR TYPE STRING,
BKREF TYPE STRING,
STATE TYPE STRING,
DEBIT TYPE STRING,
CTRNS TYPE STRING,
IBAN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T521B_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_T521B_STR-MANDT sy-vline 
WA_T521B_STR-EMFSL sy-vline 
WA_T521B_STR-ENDDA sy-vline 
WA_T521B_STR-BEGDA sy-vline 
WA_T521B_STR-EMFNA sy-vline 
WA_T521B_STR-PSTLZ sy-vline 
WA_T521B_STR-ORT01 sy-vline 
WA_T521B_STR-BANKS sy-vline 
WA_T521B_STR-BANKL sy-vline 
WA_T521B_STR-BKKTO sy-vline 
WA_T521B_STR-USBKZ sy-vline 
WA_T521B_STR-ZLSCH sy-vline 
WA_T521B_STR-STRAS sy-vline 
WA_T521B_STR-TELNR sy-vline 
WA_T521B_STR-ETEXT sy-vline 
WA_T521B_STR-CTRAN sy-vline 
WA_T521B_STR-PSKTO sy-vline 
WA_T521B_STR-PBSNR sy-vline 
WA_T521B_STR-TRANS sy-vline 
WA_T521B_STR-BKONT sy-vline 
WA_T521B_STR-BTTYP sy-vline 
WA_T521B_STR-ESRNR sy-vline 
WA_T521B_STR-BKREF sy-vline 
WA_T521B_STR-STATE sy-vline 
WA_T521B_STR-DEBIT sy-vline 
WA_T521B_STR-CTRNS sy-vline 
WA_T521B_STR-IBAN sy-vline      INTO ld_text SEPARATED BY SPACE.

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