ABAP Select data from SAP table P12DMUN_T_OCCU_INFO_2018Q1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P12DMUN_T_OCCU_INFO_2018Q1 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 P12DMUN_T_OCCU_INFO_2018Q1. 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 P12DMUN_T_OCCU_INFO_2018Q1 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_P12DMUN_T_OCCU_INFO_2018Q1 TYPE STANDARD TABLE OF P12DMUN_T_OCCU_INFO_2018Q1,
      WA_P12DMUN_T_OCCU_INFO_2018Q1 TYPE P12DMUN_T_OCCU_INFO_2018Q1,
      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: <P12DMUN_T_OCCU_INFO_2018Q1> TYPE P12DMUN_T_OCCU_INFO_2018Q1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P12DMUN_T_OCCU_INFO_2018Q1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P12DMUN_T_OCCU_INFO_2018Q1
  INTO TABLE IT_P12DMUN_T_OCCU_INFO_2018Q1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P12DMUN_T_OCCU_INFO_2018Q1
*  INTO TABLE @DATA(IT_P12DMUN_T_OCCU_INFO_2018Q12).
*--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_P12DMUN_T_OCCU_INFO_2018Q1 INDEX 1 INTO DATA(WA_P12DMUN_T_OCCU_INFO_2018Q12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P12DMUN_T_OCCU_INFO_2018Q1 ASSIGNING <P12DMUN_T_OCCU_INFO_2018Q1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P12DMUN_T_OCCU_INFO_2018Q1>-SECTN = 1.
<P12DMUN_T_OCCU_INFO_2018Q1>-MARIB = 1.
<P12DMUN_T_OCCU_INFO_2018Q1>-HOREC = 1.
<P12DMUN_T_OCCU_INFO_2018Q1>-HRRTE = 1.
<P12DMUN_T_OCCU_INFO_2018Q1>-ILLDT = 1.

ENDLOOP.

LOOP AT IT_P12DMUN_T_OCCU_INFO_2018Q1 INTO WA_P12DMUN_T_OCCU_INFO_2018Q1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P12DMUN_T_OCCU_INFO_2018Q1-PSTWO, sy-vline,
  WA_P12DMUN_T_OCCU_INFO_2018Q1-NDFWG, sy-vline,
  WA_P12DMUN_T_OCCU_INFO_2018Q1-IGRAM, sy-vline,
  WA_P12DMUN_T_OCCU_INFO_2018Q1-CAPEX, sy-vline,
  WA_P12DMUN_T_OCCU_INFO_2018Q1-SUPCE, sy-vline,
  WA_P12DMUN_T_OCCU_INFO_2018Q1-OBCIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P12DMUN_T_OCCU_INFO_2018Q1 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_P12DMUN_T_OCCU_INFO_2018Q1 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_P12DMUN_T_OCCU_INFO_2018Q1 INTO WA_P12DMUN_T_OCCU_INFO_2018Q1.


*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_P12DMUN_T_OCCU_INFO_2018Q1_STR, 
SECTN TYPE STRING,
MARIB TYPE STRING,
HOREC TYPE STRING,
HRRTE TYPE STRING,
ILLDT TYPE STRING,
PSTWO TYPE STRING,
NDFWG TYPE STRING,
IGRAM TYPE STRING,
CAPEX TYPE STRING,
SUPCE TYPE STRING,
OBCIN TYPE STRING,
DENOD TYPE STRING,
NMEDT TYPE STRING,
PSPCC TYPE STRING,
CARME TYPE STRING,
CMSNT TYPE STRING,
HOLDN TYPE STRING,
SECDT TYPE STRING,
MOBBT TYPE STRING,
ACTIO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P12DMUN_T_OCCU_INFO_2018Q1_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_P12DMUN_T_OCCU_INFO_2018Q1_STR-SECTN sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-MARIB sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-HOREC sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-HRRTE sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-ILLDT sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-PSTWO sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-NDFWG sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-IGRAM sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-CAPEX sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-SUPCE sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-OBCIN sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-DENOD sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-NMEDT sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-PSPCC sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-CARME sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-CMSNT sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-HOLDN sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-SECDT sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-MOBBT sy-vline 
WA_P12DMUN_T_OCCU_INFO_2018Q1_STR-ACTIO sy-vline      INTO ld_text SEPARATED BY SPACE.

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