ABAP Select data from SAP table PIQ_NL_STUDIELINKMESSAGE511 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PIQ_NL_STUDIELINKMESSAGE511 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 PIQ_NL_STUDIELINKMESSAGE511. 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 PIQ_NL_STUDIELINKMESSAGE511 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_PIQ_NL_STUDIELINKMESSAGE511 TYPE STANDARD TABLE OF PIQ_NL_STUDIELINKMESSAGE511,
      WA_PIQ_NL_STUDIELINKMESSAGE511 TYPE PIQ_NL_STUDIELINKMESSAGE511,
      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: <PIQ_NL_STUDIELINKMESSAGE511> TYPE PIQ_NL_STUDIELINKMESSAGE511.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PIQ_NL_STUDIELINKMESSAGE511.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PIQ_NL_STUDIELINKMESSAGE511
  INTO TABLE IT_PIQ_NL_STUDIELINKMESSAGE511.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_NL_STUDIELINKMESSAGE511
*  INTO TABLE @DATA(IT_PIQ_NL_STUDIELINKMESSAGE5112).
*--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_PIQ_NL_STUDIELINKMESSAGE511 INDEX 1 INTO DATA(WA_PIQ_NL_STUDIELINKMESSAGE5112).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PIQ_NL_STUDIELINKMESSAGE511 ASSIGNING <PIQ_NL_STUDIELINKMESSAGE511>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_NL_STUDIELINKMESSAGE511>-CONTROLLER = 1.
<PIQ_NL_STUDIELINKMESSAGE511>-STUDIELINKMESSAGE51 = 1.
<PIQ_NL_STUDIELINKMESSAGE511>-CONTROLLER = 1.
<PIQ_NL_STUDIELINKMESSAGE511>-SL_HEADER = 1.
<PIQ_NL_STUDIELINKMESSAGE511>-CONTROLLER = 1.

ENDLOOP.

LOOP AT IT_PIQ_NL_STUDIELINKMESSAGE511 INTO WA_PIQ_NL_STUDIELINKMESSAGE511.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_NL_STUDIELINKMESSAGE511-SOURCE, sy-vline,
  WA_PIQ_NL_STUDIELINKMESSAGE511-MSGID, sy-vline,
  WA_PIQ_NL_STUDIELINKMESSAGE511-SENDER, sy-vline,
  WA_PIQ_NL_STUDIELINKMESSAGE511-SL_RECEIVER, sy-vline,
  WA_PIQ_NL_STUDIELINKMESSAGE511-PROCESSID, sy-vline,
  WA_PIQ_NL_STUDIELINKMESSAGE511-FILTERCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_NL_STUDIELINKMESSAGE511 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_PIQ_NL_STUDIELINKMESSAGE511 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_PIQ_NL_STUDIELINKMESSAGE511 INTO WA_PIQ_NL_STUDIELINKMESSAGE511.


*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_PIQ_NL_STUDIELINKMESSAGE511_STR, 
CONTROLLER TYPE STRING,
STUDIELINKMESSAGE51 TYPE STRING,
CONTROLLER TYPE STRING,
SL_HEADER TYPE STRING,
CONTROLLER TYPE STRING,
SOURCE TYPE STRING,
MSGID TYPE STRING,
SENDER TYPE STRING,
SL_RECEIVER TYPE STRING,
PROCESSID TYPE STRING,
FILTERCODE TYPE STRING,
VERSION TYPE STRING,
COMPOSITENAME TYPE STRING,
SL_GBAADDRESS TYPE STRING,
CONTROLLER TYPE STRING,
ADR_KIND TYPE STRING,
DATE_FROM TYPE STRING,
DATE_UNTIL TYPE STRING,
STREET TYPE STRING,
LOCATION TYPE STRING,
HOUSENUMBERREF TYPE STRING,
HOUSENUMBER TYPE STRING,
HOUSENUMBERADD TYPE STRING,
ZIPCODE TYPE STRING,
ZIPCHECKCORR TYPE STRING,
CITY TYPE STRING,
COUNTRY TYPE STRING,
SL_FOREIGNADRS TYPE STRING,
CONTROLLER TYPE STRING,
FADR_KIND TYPE STRING,
DATE_FROM TYPE STRING,
STREET TYPE STRING,
HOUSENUMBERADD TYPE STRING,
ZIPCODE TYPE STRING,
CITY TYPE STRING,
ADDITIONAL_INFO TYPE STRING,
FCOUNTRY TYPE STRING,
NATIONALITY TYPE STRING,
NATIONALITY1_BEGDA TYPE STRING,
NATIONALITY2 TYPE STRING,
NATIONALITY2_BEGDA TYPE STRING,
DOCTYPRESPERM TYPE STRING,
DOCTYPRESPERM_BEGDA TYPE STRING,
DOCTYPRESPERM_ENDDA TYPE STRING,
SL_IDENTIFYNUMBERS TYPE STRING,
CONTROLLER TYPE STRING,
O_NUMBER TYPE STRING,
STUDIELINK_NO TYPE STRING,
OCW_NUMBER TYPE STRING,
BSN_NUMBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_NL_STUDIELINKMESSAGE511_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_PIQ_NL_STUDIELINKMESSAGE511_STR-CONTROLLER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-STUDIELINKMESSAGE51 sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-CONTROLLER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-SL_HEADER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-CONTROLLER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-SOURCE sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-MSGID sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-SENDER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-SL_RECEIVER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-PROCESSID sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-FILTERCODE sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-VERSION sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-COMPOSITENAME sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-SL_GBAADDRESS sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-CONTROLLER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-ADR_KIND sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-DATE_FROM sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-DATE_UNTIL sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-STREET sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-LOCATION sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-HOUSENUMBERREF sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-HOUSENUMBER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-HOUSENUMBERADD sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-ZIPCODE sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-ZIPCHECKCORR sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-CITY sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-COUNTRY sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-SL_FOREIGNADRS sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-CONTROLLER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-FADR_KIND sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-DATE_FROM sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-STREET sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-HOUSENUMBERADD sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-ZIPCODE sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-CITY sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-ADDITIONAL_INFO sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-FCOUNTRY sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-NATIONALITY sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-NATIONALITY1_BEGDA sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-NATIONALITY2 sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-NATIONALITY2_BEGDA sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-DOCTYPRESPERM sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-DOCTYPRESPERM_BEGDA sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-DOCTYPRESPERM_ENDDA sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-SL_IDENTIFYNUMBERS sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-CONTROLLER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-O_NUMBER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-STUDIELINK_NO sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-OCW_NUMBER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE511_STR-BSN_NUMBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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