ABAP Select data from SAP table /NAKISA/NAK_POS_DETAIL_EMP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /NAKISA/NAK_POS_DETAIL_EMP 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 /NAKISA/NAK_POS_DETAIL_EMP. 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 /NAKISA/NAK_POS_DETAIL_EMP 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_/NAKISA/NAK_POS_DETAIL_EMP TYPE STANDARD TABLE OF /NAKISA/NAK_POS_DETAIL_EMP,
      WA_/NAKISA/NAK_POS_DETAIL_EMP TYPE /NAKISA/NAK_POS_DETAIL_EMP,
      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: </NAKISA/NAK_POS_DETAIL_EMP> TYPE /NAKISA/NAK_POS_DETAIL_EMP.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /NAKISA/NAK_POS_DETAIL_EMP
  INTO TABLE IT_/NAKISA/NAK_POS_DETAIL_EMP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /NAKISA/NAK_POS_DETAIL_EMP
*  INTO TABLE @DATA(IT_/NAKISA/NAK_POS_DETAIL_EMP2).
*--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_/NAKISA/NAK_POS_DETAIL_EMP INDEX 1 INTO DATA(WA_/NAKISA/NAK_POS_DETAIL_EMP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/NAKISA/NAK_POS_DETAIL_EMP ASSIGNING </NAKISA/NAK_POS_DETAIL_EMP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</NAKISA/NAK_POS_DETAIL_EMP>-POSITION_ID = 1.
</NAKISA/NAK_POS_DETAIL_EMP>-POSITION_ABBR = 1.
</NAKISA/NAK_POS_DETAIL_EMP>-POSITION_STEXT = 1.
</NAKISA/NAK_POS_DETAIL_EMP>-PERSONNEL_ID = 1.
</NAKISA/NAK_POS_DETAIL_EMP>-PERSON_NAME = 1.

ENDLOOP.

LOOP AT IT_/NAKISA/NAK_POS_DETAIL_EMP INTO WA_/NAKISA/NAK_POS_DETAIL_EMP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/NAKISA/NAK_POS_DETAIL_EMP-LOCATION, sy-vline,
  WA_/NAKISA/NAK_POS_DETAIL_EMP-COUNTRY, sy-vline,
  WA_/NAKISA/NAK_POS_DETAIL_EMP-FIRSTNAME, sy-vline,
  WA_/NAKISA/NAK_POS_DETAIL_EMP-LASTNAME, sy-vline,
  WA_/NAKISA/NAK_POS_DETAIL_EMP-LASTNAME2, sy-vline,
  WA_/NAKISA/NAK_POS_DETAIL_EMP-NICKNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/NAKISA/NAK_POS_DETAIL_EMP 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_/NAKISA/NAK_POS_DETAIL_EMP 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_/NAKISA/NAK_POS_DETAIL_EMP INTO WA_/NAKISA/NAK_POS_DETAIL_EMP.


*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 PDATE, internal->external for field BIRTH_DATE
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_/NAKISA/NAK_POS_DETAIL_EMP-BIRTH_DATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/NAKISA/NAK_POS_DETAIL_EMP-BIRTH_DATE.
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_/NAKISA/NAK_POS_DETAIL_EMP_STR, 
POSITION_ID TYPE STRING,
POSITION_ABBR TYPE STRING,
POSITION_STEXT TYPE STRING,
PERSONNEL_ID TYPE STRING,
PERSON_NAME TYPE STRING,
LOCATION TYPE STRING,
COUNTRY TYPE STRING,
FIRSTNAME TYPE STRING,
LASTNAME TYPE STRING,
LASTNAME2 TYPE STRING,
NICKNAME TYPE STRING,
MIDDLENAME TYPE STRING,
NAME_TITLE TYPE STRING,
NAME_TITLE2 TYPE STRING,
NAME_PREFIX TYPE STRING,
NAME_PREFIX2 TYPE STRING,
FORMOFADDR TYPE STRING,
FIRSTNAME_K TYPE STRING,
FIRSTNAME_R TYPE STRING,
LASTNAME_K TYPE STRING,
LASTNAME_R TYPE STRING,
NICKNAME_K TYPE STRING,
NICKNAME_R TYPE STRING,
EMAIL TYPE STRING,
TELEPHONE TYPE STRING,
CELL TYPE STRING,
FAX TYPE STRING,
CALL_FROM TYPE STRING,
PIC_URL TYPE STRING,
ADDRESS TYPE STRING,
BIRTH_DATE TYPE STRING,
PLACE_OF_BIRTH TYPE STRING,
MARITAL_STATUS TYPE STRING,
MARITAL_TEXT TYPE STRING,
DATE_OF_JOIN TYPE STRING,
PERSON_FTE TYPE STRING,
WEEKLY_WRKNG_HRS TYPE STRING,
PART_TIME TYPE STRING,
EMPLOYEE_GROUP TYPE STRING,
EMPLOYEE_GROUP_NAME TYPE STRING,
EMPLOYEE_SUB_GROUP TYPE STRING,
EMPLOYEE_SUB_GROUP_NAME TYPE STRING,
CURRENT_FUNCTION_START_DATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/NAKISA/NAK_POS_DETAIL_EMP_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_/NAKISA/NAK_POS_DETAIL_EMP_STR-POSITION_ID sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-POSITION_ABBR sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-POSITION_STEXT sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-PERSONNEL_ID sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-PERSON_NAME sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-LOCATION sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-COUNTRY sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-FIRSTNAME sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-LASTNAME sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-LASTNAME2 sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-NICKNAME sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-MIDDLENAME sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-NAME_TITLE sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-NAME_TITLE2 sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-NAME_PREFIX sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-NAME_PREFIX2 sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-FORMOFADDR sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-FIRSTNAME_K sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-FIRSTNAME_R sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-LASTNAME_K sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-LASTNAME_R sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-NICKNAME_K sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-NICKNAME_R sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-EMAIL sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-TELEPHONE sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-CELL sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-FAX sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-CALL_FROM sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-PIC_URL sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-ADDRESS sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-BIRTH_DATE sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-PLACE_OF_BIRTH sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-MARITAL_STATUS sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-MARITAL_TEXT sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-DATE_OF_JOIN sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-PERSON_FTE sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-WEEKLY_WRKNG_HRS sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-PART_TIME sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-EMPLOYEE_GROUP sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-EMPLOYEE_GROUP_NAME sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-EMPLOYEE_SUB_GROUP sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-EMPLOYEE_SUB_GROUP_NAME sy-vline 
WA_/NAKISA/NAK_POS_DETAIL_EMP_STR-CURRENT_FUNCTION_START_DATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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