ABAP Select data from SAP table PIQ_ES_STUDENT_LIST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PIQ_ES_STUDENT_LIST 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_ES_STUDENT_LIST. 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_ES_STUDENT_LIST 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_ES_STUDENT_LIST TYPE STANDARD TABLE OF PIQ_ES_STUDENT_LIST,
      WA_PIQ_ES_STUDENT_LIST TYPE PIQ_ES_STUDENT_LIST,
      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_ES_STUDENT_LIST> TYPE PIQ_ES_STUDENT_LIST.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_ES_STUDENT_LIST
*  INTO TABLE @DATA(IT_PIQ_ES_STUDENT_LIST2).
*--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_ES_STUDENT_LIST INDEX 1 INTO DATA(WA_PIQ_ES_STUDENT_LIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_ES_STUDENT_LIST>-ST_OBJID = 1.
<PIQ_ES_STUDENT_LIST>-ST_BPID = 1.
<PIQ_ES_STUDENT_LIST>-ST_NUMBER = 1.
<PIQ_ES_STUDENT_LIST>-ST_ID_NUMBER = 1.
<PIQ_ES_STUDENT_LIST>-ST_NAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_ES_STUDENT_LIST-ST_DOB, sy-vline,
  WA_PIQ_ES_STUDENT_LIST-ST_PGM_STUDY, sy-vline,
  WA_PIQ_ES_STUDENT_LIST-ST_EMAIL, sy-vline,
  WA_PIQ_ES_STUDENT_LIST-FORM_OF_ADDRESS_KEY, sy-vline,
  WA_PIQ_ES_STUDENT_LIST-FORM_OF_ADDRESS_KEY_TXT, sy-vline,
  WA_PIQ_ES_STUDENT_LIST-INITIALS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_ES_STUDENT_LIST 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_ES_STUDENT_LIST 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_ES_STUDENT_LIST INTO WA_PIQ_ES_STUDENT_LIST.


*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.

*Conversion exit ALPHA, internal->external for field ST_BPID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_ES_STUDENT_LIST-ST_BPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_ES_STUDENT_LIST-ST_BPID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PIQST, internal->external for field ST_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_PIQST_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_ES_STUDENT_LIST-ST_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_ES_STUDENT_LIST-ST_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PDATE, internal->external for field ST_DOB
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_ES_STUDENT_LIST-ST_DOB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_ES_STUDENT_LIST-ST_DOB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field ST_EMAIL
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_ES_STUDENT_LIST-ST_EMAIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_ES_STUDENT_LIST-ST_EMAIL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PDATE, internal->external for field DATE_BIRTH
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_ES_STUDENT_LIST-DATE_BIRTH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_ES_STUDENT_LIST-DATE_BIRTH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field CORRESP_LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_ES_STUDENT_LIST-CORRESP_LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_ES_STUDENT_LIST-CORRESP_LANGUAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field FATHER_EMAIL
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_ES_STUDENT_LIST-FATHER_EMAIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_ES_STUDENT_LIST-FATHER_EMAIL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field MOTHER_EMAIL
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_ES_STUDENT_LIST-MOTHER_EMAIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_ES_STUDENT_LIST-MOTHER_EMAIL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field GUARDIAN_EMAIL
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_ES_STUDENT_LIST-GUARDIAN_EMAIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_ES_STUDENT_LIST-GUARDIAN_EMAIL.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PIQ_ES_STUDENT_LIST_STR, 
ST_OBJID TYPE STRING,
ST_BPID TYPE STRING,
ST_NUMBER TYPE STRING,
ST_ID_NUMBER TYPE STRING,
ST_NAME TYPE STRING,
ST_DOB TYPE STRING,
ST_PGM_STUDY TYPE STRING,
ST_EMAIL TYPE STRING,
FORM_OF_ADDRESS_KEY TYPE STRING,
FORM_OF_ADDRESS_KEY_TXT TYPE STRING,
INITIALS TYPE STRING,
FIRST_NAME TYPE STRING,
LAST_NAME TYPE STRING,
MIDDLE_NAME TYPE STRING,
TITEL TYPE STRING,
TITEL_TXT TYPE STRING,
NAME_AFFIX TYPE STRING,
NAME_AFFIX_TXT TYPE STRING,
ARISTOCRATIC_TITLE TYPE STRING,
ARISTOCRATIC_TITLE_TXT TYPE STRING,
NICKNAME TYPE STRING,
NAME_AT_BIRTH TYPE STRING,
DATE_BIRTH TYPE STRING,
BIRTHPLACE TYPE STRING,
COUNTRY_OF_BIRTH TYPE STRING,
COUNTRY_OF_BIRTH_ISO TYPE STRING,
NAMEOFBIRTHCOUNTRY TYPE STRING,
REGION_OF_BIRTH TYPE STRING,
NAMEOFBIRTHSTATE TYPE STRING,
NATIONALITY_AT_BIRTH TYPE STRING,
NATIONALITY_AT_BIRTH_ISO TYPE STRING,
NATIONALITY_AT_BIRTH_TXT TYPE STRING,
NATIONALITY TYPE STRING,
NATIONALITY_ISO TYPE STRING,
NATIONALITY_TXT TYPE STRING,
SECOND_NATIONALITY TYPE STRING,
SECOND_NATIONALITY_ISO TYPE STRING,
SECOND_NATIONALITY_TXT TYPE STRING,
THIRD_NATIONALITY TYPE STRING,
THIRD_NATIONALITY_ISO TYPE STRING,
THIRD_NATIONALITY_TXT TYPE STRING,
GENDER_KEY TYPE STRING,
GENDER_KEY_TXT TYPE STRING,
MARITAL_STATUS TYPE STRING,
MARITAL_STATUS_TXT TYPE STRING,
PERSIDNO TYPE STRING,
CORRESP_LANGUAGE TYPE STRING,
CORRESP_LANGUAGE_ISO TYPE STRING,
CORRESP_LANGUAGE_TXT TYPE STRING,
DEATH_DATE TYPE STRING,
DEATH_REGDATE TYPE STRING,
FATHER_EMAIL TYPE STRING,
MOTHER_EMAIL TYPE STRING,
GUARDIAN_EMAIL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_ES_STUDENT_LIST_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_ES_STUDENT_LIST_STR-ST_OBJID sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-ST_BPID sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-ST_NUMBER sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-ST_ID_NUMBER sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-ST_NAME sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-ST_DOB sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-ST_PGM_STUDY sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-ST_EMAIL sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-FORM_OF_ADDRESS_KEY sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-FORM_OF_ADDRESS_KEY_TXT sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-INITIALS sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-FIRST_NAME sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-LAST_NAME sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-MIDDLE_NAME sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-TITEL sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-TITEL_TXT sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-NAME_AFFIX sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-NAME_AFFIX_TXT sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-ARISTOCRATIC_TITLE sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-ARISTOCRATIC_TITLE_TXT sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-NICKNAME sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-NAME_AT_BIRTH sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-DATE_BIRTH sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-BIRTHPLACE sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-COUNTRY_OF_BIRTH sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-COUNTRY_OF_BIRTH_ISO sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-NAMEOFBIRTHCOUNTRY sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-REGION_OF_BIRTH sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-NAMEOFBIRTHSTATE sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-NATIONALITY_AT_BIRTH sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-NATIONALITY_AT_BIRTH_ISO sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-NATIONALITY_AT_BIRTH_TXT sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-NATIONALITY sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-NATIONALITY_ISO sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-NATIONALITY_TXT sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-SECOND_NATIONALITY sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-SECOND_NATIONALITY_ISO sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-SECOND_NATIONALITY_TXT sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-THIRD_NATIONALITY sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-THIRD_NATIONALITY_ISO sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-THIRD_NATIONALITY_TXT sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-GENDER_KEY sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-GENDER_KEY_TXT sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-MARITAL_STATUS sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-MARITAL_STATUS_TXT sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-PERSIDNO sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-CORRESP_LANGUAGE sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-CORRESP_LANGUAGE_ISO sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-CORRESP_LANGUAGE_TXT sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-DEATH_DATE sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-DEATH_REGDATE sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-FATHER_EMAIL sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-MOTHER_EMAIL sy-vline 
WA_PIQ_ES_STUDENT_LIST_STR-GUARDIAN_EMAIL sy-vline      INTO ld_text SEPARATED BY SPACE.

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