ABAP Select data from SAP table PIQ_NL_STUDIELINKMESSAGE08 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_STUDIELINKMESSAGE08 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_STUDIELINKMESSAGE08. 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_STUDIELINKMESSAGE08 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_STUDIELINKMESSAGE08 TYPE STANDARD TABLE OF PIQ_NL_STUDIELINKMESSAGE08,
      WA_PIQ_NL_STUDIELINKMESSAGE08 TYPE PIQ_NL_STUDIELINKMESSAGE08,
      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_STUDIELINKMESSAGE08> TYPE PIQ_NL_STUDIELINKMESSAGE08.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PIQ_NL_STUDIELINKMESSAGE08.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PIQ_NL_STUDIELINKMESSAGE08
  INTO TABLE IT_PIQ_NL_STUDIELINKMESSAGE08.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_NL_STUDIELINKMESSAGE08
*  INTO TABLE @DATA(IT_PIQ_NL_STUDIELINKMESSAGE082).
*--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_STUDIELINKMESSAGE08 INDEX 1 INTO DATA(WA_PIQ_NL_STUDIELINKMESSAGE082).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PIQ_NL_STUDIELINKMESSAGE08 ASSIGNING <PIQ_NL_STUDIELINKMESSAGE08>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_NL_STUDIELINKMESSAGE08>-CONTROLLER = 1.
<PIQ_NL_STUDIELINKMESSAGE08>-SL_HEADER = 1.
<PIQ_NL_STUDIELINKMESSAGE08>-CONTROLLER = 1.
<PIQ_NL_STUDIELINKMESSAGE08>-SOURCE = 1.
<PIQ_NL_STUDIELINKMESSAGE08>-MSGID = 1.

ENDLOOP.

LOOP AT IT_PIQ_NL_STUDIELINKMESSAGE08 INTO WA_PIQ_NL_STUDIELINKMESSAGE08.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_NL_STUDIELINKMESSAGE08-SENDER, sy-vline,
  WA_PIQ_NL_STUDIELINKMESSAGE08-SL_RECEIVER, sy-vline,
  WA_PIQ_NL_STUDIELINKMESSAGE08-PROCESSID, sy-vline,
  WA_PIQ_NL_STUDIELINKMESSAGE08-FILTERCODE, sy-vline,
  WA_PIQ_NL_STUDIELINKMESSAGE08-VERSION, sy-vline,
  WA_PIQ_NL_STUDIELINKMESSAGE08-COMPOSITENAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_NL_STUDIELINKMESSAGE08 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_STUDIELINKMESSAGE08 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_STUDIELINKMESSAGE08 INTO WA_PIQ_NL_STUDIELINKMESSAGE08.


*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_STUDIELINKMESSAGE08_STR, 
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_IDENTIFYNUMBERS TYPE STRING,
CONTROLLER TYPE STRING,
O_NUMBER TYPE STRING,
STUDIELINK_NO TYPE STRING,
OCW_NUMBER TYPE STRING,
SSN_NUMBER TYPE STRING,
SL_EDUCATION TYPE STRING,
CONTROLLER TYPE STRING,
PROGCODE TYPE STRING,
ALTPROGCODE TYPE STRING,
BRINNUMBER TYPE STRING,
BRINSEQUENCE TYPE STRING,
FORMOFEDUCATION TYPE STRING,
LOCATIONEDU TYPE STRING,
EDUPHASECODE TYPE STRING,
ENROLLFORMCODE TYPE STRING,
YEAROFSTUDY TYPE STRING,
STARTMONTH TYPE STRING,
ENROLLMENTCODE TYPE STRING,
REG_NUM TYPE STRING,
UPD_REG_NUM TYPE STRING,
SL_BILLING TYPE STRING,
CONTROLLER TYPE STRING,
PAIDBY TYPE STRING,
PAYMENTTYPE TYPE STRING,
PAYMENTNAME TYPE STRING,
ADR_KIND_BILL TYPE STRING,
STREET_BLK TYPE STRING,
LOCATION_BLK TYPE STRING,
HOUSENUMBERREF_BLK TYPE STRING,
HOUSENUMBER_BLK TYPE STRING,
HOUSENUMBERADD_BLK TYPE STRING,
ZIPCODE_BLK TYPE STRING,
ZIPCHECKCORR_BLK TYPE STRING,
CITY_BLK TYPE STRING,
COUNTRY_BLK TYPE STRING,
ADR_KIND_FOR TYPE STRING,
SL_ADRSLINE_FOR TYPE STRING,
COUNTRY_FOR TYPE STRING,
PAYMENTBANKGBA TYPE STRING,
PAYMENTBANKFORE TYPE STRING,
BANK TYPE STRING,
BANKCOUNTRY TYPE STRING,
INSTALLMENTS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_NL_STUDIELINKMESSAGE08_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_STUDIELINKMESSAGE08_STR-CONTROLLER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-SL_HEADER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-CONTROLLER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-SOURCE sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-MSGID sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-SENDER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-SL_RECEIVER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-PROCESSID sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-FILTERCODE sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-VERSION sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-COMPOSITENAME sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-SL_IDENTIFYNUMBERS sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-CONTROLLER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-O_NUMBER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-STUDIELINK_NO sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-OCW_NUMBER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-SSN_NUMBER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-SL_EDUCATION sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-CONTROLLER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-PROGCODE sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-ALTPROGCODE sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-BRINNUMBER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-BRINSEQUENCE sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-FORMOFEDUCATION sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-LOCATIONEDU sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-EDUPHASECODE sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-ENROLLFORMCODE sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-YEAROFSTUDY sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-STARTMONTH sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-ENROLLMENTCODE sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-REG_NUM sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-UPD_REG_NUM sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-SL_BILLING sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-CONTROLLER sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-PAIDBY sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-PAYMENTTYPE sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-PAYMENTNAME sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-ADR_KIND_BILL sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-STREET_BLK sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-LOCATION_BLK sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-HOUSENUMBERREF_BLK sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-HOUSENUMBER_BLK sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-HOUSENUMBERADD_BLK sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-ZIPCODE_BLK sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-ZIPCHECKCORR_BLK sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-CITY_BLK sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-COUNTRY_BLK sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-ADR_KIND_FOR sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-SL_ADRSLINE_FOR sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-COUNTRY_FOR sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-PAYMENTBANKGBA sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-PAYMENTBANKFORE sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-BANK sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-BANKCOUNTRY sy-vline 
WA_PIQ_NL_STUDIELINKMESSAGE08_STR-INSTALLMENTS sy-vline      INTO ld_text SEPARATED BY SPACE.

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