ABAP Select data from SAP table PIQ_US_NSCH_ITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PIQ_US_NSCH_ITEM 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_US_NSCH_ITEM. 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_US_NSCH_ITEM 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_US_NSCH_ITEM TYPE STANDARD TABLE OF PIQ_US_NSCH_ITEM,
      WA_PIQ_US_NSCH_ITEM TYPE PIQ_US_NSCH_ITEM,
      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_US_NSCH_ITEM> TYPE PIQ_US_NSCH_ITEM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_US_NSCH_ITEM
*  INTO TABLE @DATA(IT_PIQ_US_NSCH_ITEM2).
*--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_US_NSCH_ITEM INDEX 1 INTO DATA(WA_PIQ_US_NSCH_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_US_NSCH_ITEM>-ORG_OBJECTID = 1.
<PIQ_US_NSCH_ITEM>-STUDENT_OBJID = 1.
<PIQ_US_NSCH_ITEM>-STUDENTNUMBER = 1.
<PIQ_US_NSCH_ITEM>-PERSIDNO = 1.
<PIQ_US_NSCH_ITEM>-FIRST_NAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_US_NSCH_ITEM-MIDDLE_NAME, sy-vline,
  WA_PIQ_US_NSCH_ITEM-LAST_NAME, sy-vline,
  WA_PIQ_US_NSCH_ITEM-INITIALS, sy-vline,
  WA_PIQ_US_NSCH_ITEM-NAME_AT_BIRTH, sy-vline,
  WA_PIQ_US_NSCH_ITEM-ENROLLMENT_STATUS, sy-vline,
  WA_PIQ_US_NSCH_ITEM-ENROLL_START_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_US_NSCH_ITEM 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_US_NSCH_ITEM 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_US_NSCH_ITEM INTO WA_PIQ_US_NSCH_ITEM.


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

*Conversion exit PDATE, internal->external for field DATE_BIRTH
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_US_NSCH_ITEM-DATE_BIRTH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_US_NSCH_ITEM-DATE_BIRTH.
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_US_NSCH_ITEM_STR, 
ORG_OBJECTID TYPE STRING,
STUDENT_OBJID TYPE STRING,
STUDENTNUMBER TYPE STRING,
PERSIDNO TYPE STRING,
FIRST_NAME TYPE STRING,
MIDDLE_NAME TYPE STRING,
LAST_NAME TYPE STRING,
INITIALS TYPE STRING,
NAME_AT_BIRTH TYPE STRING,
ENROLLMENT_STATUS TYPE STRING,
ENROLL_START_DATE TYPE STRING,
STREET TYPE STRING,
STR_SUPPL1 TYPE STRING,
CITY TYPE STRING,
REGION TYPE STRING,
POSTL_COD1 TYPE STRING,
COUNTRY TYPE STRING,
ANTICIP_GRAD_DATE TYPE STRING,
DATE_BIRTH TYPE STRING,
TERM_BEGDA TYPE STRING,
TERM_ENDDA TYPE STRING,
NSCH_GRAD_LEVEL TYPE STRING,
DATA_BLOCK_INDICATOR TYPE STRING,
NSCH_DEGREE_LEVEL TYPE STRING,
CQ_OBJID TYPE STRING,
QUAL_DESC TYPE STRING,
QUAL_SHORT TYPE STRING,
SCHOOL_AWARDING_DEGREE TYPE STRING,
QUAL_CONFER_DATE TYPE STRING,
PROGRAM_OBJECTID TYPE STRING,
PROGRAM_NAME TYPE STRING,
REGIST_DATE TYPE STRING,
MAJOR1 TYPE STRING,
MAJOR2 TYPE STRING,
MAJOR3 TYPE STRING,
MAJOR4 TYPE STRING,
MINOR1 TYPE STRING,
MINOR2 TYPE STRING,
MINOR3 TYPE STRING,
MINOR4 TYPE STRING,
MAJOR1_TXT TYPE STRING,
MAJOR2_TXT TYPE STRING,
MAJOR3_TXT TYPE STRING,
MAJOR4_TXT TYPE STRING,
MINOR1_TXT TYPE STRING,
MINOR2_TXT TYPE STRING,
MINOR3_TXT TYPE STRING,
MINOR4_TXT TYPE STRING,
CIP_MAJOR1 TYPE STRING,
CIP_MAJOR2 TYPE STRING,
CIP_MAJOR3 TYPE STRING,
CIP_MAJOR4 TYPE STRING,
CIP_MINOR1 TYPE STRING,
CIP_MINOR2 TYPE STRING,
CIP_MINOR3 TYPE STRING,
CIP_MINOR4 TYPE STRING,
CIP_TXT_MAJOR1 TYPE STRING,
CIP_TXT_MAJOR2 TYPE STRING,
CIP_TXT_MAJOR3 TYPE STRING,
CIP_TXT_MAJOR4 TYPE STRING,
CIP_TXT_MINOR1 TYPE STRING,
CIP_TXT_MINOR2 TYPE STRING,
CIP_TXT_MINOR3 TYPE STRING,
CIP_TXT_MINOR4 TYPE STRING,
CLASS TYPE STRING,
FIRST_TIME_FULL_TIME TYPE STRING,
DEGREE_SEEKING TYPE STRING,
HIGH_SCHOOL_CODE TYPE STRING,
GENDER TYPE STRING,
RACE_ETHINICITY TYPE STRING,
COLLEGE_STUDENT_ID TYPE STRING,
STATE_STUDENT_ID TYPE STRING,
EMAIL_ID TYPE STRING,
GOOD_STUDENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_US_NSCH_ITEM_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_US_NSCH_ITEM_STR-ORG_OBJECTID sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-STUDENT_OBJID sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-STUDENTNUMBER sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-PERSIDNO sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-FIRST_NAME sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MIDDLE_NAME sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-LAST_NAME sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-INITIALS sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-NAME_AT_BIRTH sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-ENROLLMENT_STATUS sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-ENROLL_START_DATE sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-STREET sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-STR_SUPPL1 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CITY sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-REGION sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-POSTL_COD1 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-COUNTRY sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-ANTICIP_GRAD_DATE sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-DATE_BIRTH sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-TERM_BEGDA sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-TERM_ENDDA sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-NSCH_GRAD_LEVEL sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-DATA_BLOCK_INDICATOR sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-NSCH_DEGREE_LEVEL sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CQ_OBJID sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-QUAL_DESC sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-QUAL_SHORT sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-SCHOOL_AWARDING_DEGREE sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-QUAL_CONFER_DATE sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-PROGRAM_OBJECTID sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-PROGRAM_NAME sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-REGIST_DATE sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MAJOR1 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MAJOR2 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MAJOR3 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MAJOR4 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MINOR1 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MINOR2 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MINOR3 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MINOR4 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MAJOR1_TXT sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MAJOR2_TXT sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MAJOR3_TXT sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MAJOR4_TXT sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MINOR1_TXT sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MINOR2_TXT sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MINOR3_TXT sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-MINOR4_TXT sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_MAJOR1 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_MAJOR2 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_MAJOR3 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_MAJOR4 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_MINOR1 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_MINOR2 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_MINOR3 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_MINOR4 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_TXT_MAJOR1 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_TXT_MAJOR2 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_TXT_MAJOR3 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_TXT_MAJOR4 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_TXT_MINOR1 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_TXT_MINOR2 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_TXT_MINOR3 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CIP_TXT_MINOR4 sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-CLASS sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-FIRST_TIME_FULL_TIME sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-DEGREE_SEEKING sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-HIGH_SCHOOL_CODE sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-GENDER sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-RACE_ETHINICITY sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-COLLEGE_STUDENT_ID sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-STATE_STUDENT_ID sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-EMAIL_ID sy-vline 
WA_PIQ_US_NSCH_ITEM_STR-GOOD_STUDENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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