ABAP Select data from SAP table DB02N_DATA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB02N_DATA 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 DB02N_DATA. 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 DB02N_DATA 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_DB02N_DATA TYPE STANDARD TABLE OF DB02N_DATA,
      WA_DB02N_DATA TYPE DB02N_DATA,
      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: <DB02N_DATA> TYPE DB02N_DATA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB02N_DATA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB02N_DATA
  INTO TABLE IT_DB02N_DATA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB02N_DATA
*  INTO TABLE @DATA(IT_DB02N_DATA2).
*--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_DB02N_DATA INDEX 1 INTO DATA(WA_DB02N_DATA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB02N_DATA ASSIGNING <DB02N_DATA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB02N_DATA>-DB_NAME = 1.
<DB02N_DATA>-DB_SYSDATE = 1.
<DB02N_DATA>-DB_SYSTIME = 1.
<DB02N_DATA>-DB_ANALYD = 1.
<DB02N_DATA>-DB_ANALYT = 1.

ENDLOOP.

LOOP AT IT_DB02N_DATA INTO WA_DB02N_DATA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB02N_DATA-DB_CREATDAT, sy-vline,
  WA_DB02N_DATA-DB_SYSTEM, sy-vline,
  WA_DB02N_DATA-DB_SIZE, sy-vline,
  WA_DB02N_DATA-DB_TOT_PER_USED, sy-vline,
  WA_DB02N_DATA-DB_TOT_FREE, sy-vline,
  WA_DB02N_DATA-DB_TOT_SIZE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB02N_DATA 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_DB02N_DATA 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_DB02N_DATA INTO WA_DB02N_DATA.


*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_DB02N_DATA_STR, 
DB_NAME TYPE STRING,
DB_SYSDATE TYPE STRING,
DB_SYSTIME TYPE STRING,
DB_ANALYD TYPE STRING,
DB_ANALYT TYPE STRING,
DB_CREATDAT TYPE STRING,
DB_SYSTEM TYPE STRING,
DB_SIZE TYPE STRING,
DB_TOT_PER_USED TYPE STRING,
DB_TOT_FREE TYPE STRING,
DB_TOT_SIZE TYPE STRING,
DB_FREE TYPE STRING,
DB_PER_USED TYPE STRING,
US_NUM TYPE STRING,
US_MAX_SIZE TYPE STRING,
US_MAX_SIZE_WHO TYPE STRING,
US_MAX_OBJ TYPE STRING,
US_MAX_OBJ_WHO TYPE STRING,
TS_NUM TYPE STRING,
TS_MAX_SIZE TYPE STRING,
TS_MAX_SIZE_WHO TYPE STRING,
TS_MIN_FREE TYPE STRING,
TS_MIN_FREE_WHO TYPE STRING,
TS_MAX_FILES TYPE STRING,
TS_MAX_FILES_WHO TYPE STRING,
TS_DICT TYPE STRING,
TS_DICT_WHO TYPE STRING,
SE_TAB_NUM TYPE STRING,
SE_TAB_SIZE TYPE STRING,
SE_TAB_NUM_M100 TYPE STRING,
SE_TAB_NUM_COMP TYPE STRING,
SE_TAB_NUM_NOLOG TYPE STRING,
SE_TAB_NUM_CRIT TYPE STRING,
SE_TAB_NUM_M_DB TYPE STRING,
SE_TAB_NUM_M_R3 TYPE STRING,
SE_IND_NUM TYPE STRING,
SE_IND_SIZE TYPE STRING,
SE_IND_NUM_M100 TYPE STRING,
SE_IND_NUM_COMP TYPE STRING,
SE_IND_NUM_NOLOG TYPE STRING,
SE_IND_NUM_CRIT TYPE STRING,
SE_IND_NUM_M_DB TYPE STRING,
SE_IND_NUM_M_R3 TYPE STRING,
SE_OTH_NUM TYPE STRING,
SE_OTH_SIZE TYPE STRING,
SE_OTH_NUM_M100 TYPE STRING,
SE_OTH_NUM_COMP TYPE STRING,
SE_OTH_NUM_NOLOG TYPE STRING,
SE_OTH_NUM_CRIT TYPE STRING,
SE_OTH_NUM_M_DB TYPE STRING,
SE_OTH_NUM_M_R3 TYPE STRING,
SE_TOT_NUM TYPE STRING,
SE_TOT_SIZE TYPE STRING,
SE_TOT_NUM_M100 TYPE STRING,
SE_TOT_NUM_COMP TYPE STRING,
SE_TOT_NUM_NOLOG TYPE STRING,
SE_TOT_NUM_CRIT TYPE STRING,
SE_TOT_NUM_M_DB TYPE STRING,
SE_TOT_NUM_M_R3 TYPE STRING,
AGG_TAB_NUM TYPE STRING,
AGG_TAB_CREATED TYPE STRING,
AGG_TAB_SIZE TYPE STRING,
AGG_TAB_PART TYPE STRING,
AGG_TAB_LOBS TYPE STRING,
AGG_TAB_NUM_M100 TYPE STRING,
AGG_TAB_NUM_CRIT TYPE STRING,
AGG_TAB_NUM_COMP TYPE STRING,
AGG_TAB_NUM_NOLOG TYPE STRING,
AGG_IND_NUM TYPE STRING,
AGG_IND_CREATED TYPE STRING,
AGG_IND_SIZE TYPE STRING,
AGG_IND_PART TYPE STRING,
AGG_IND_LOBS TYPE STRING,
AGG_IND_NUM_M100 TYPE STRING,
AGG_IND_NUM_CRIT TYPE STRING,
AGG_IND_NUM_COMP TYPE STRING,
AGG_IND_NUM_NOLOG TYPE STRING,
AGG_OTH_NUM TYPE STRING,
AGG_OTH_CREATED TYPE STRING,
AGG_OTH_SIZE TYPE STRING,
AGG_OTH_PART TYPE STRING,
AGG_OTH_LOBS TYPE STRING,
AGG_OTH_NUM_M100 TYPE STRING,
AGG_OTH_NUM_CRIT TYPE STRING,
AGG_OTH_NUM_COMP TYPE STRING,
AGG_OTH_NUM_NOLOG TYPE STRING,
AGG_TOT_NUM TYPE STRING,
AGG_TOT_CREATED TYPE STRING,
AGG_TOT_SIZE TYPE STRING,
AGG_TOT_PART TYPE STRING,
AGG_TOT_LOBS TYPE STRING,
AGG_TOT_NUM_M100 TYPE STRING,
AGG_TOT_NUM_CRIT TYPE STRING,
AGG_TOT_NUM_COMP TYPE STRING,
AGG_TOT_NUM_NOLOG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB02N_DATA_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_DB02N_DATA_STR-DB_NAME sy-vline 
WA_DB02N_DATA_STR-DB_SYSDATE sy-vline 
WA_DB02N_DATA_STR-DB_SYSTIME sy-vline 
WA_DB02N_DATA_STR-DB_ANALYD sy-vline 
WA_DB02N_DATA_STR-DB_ANALYT sy-vline 
WA_DB02N_DATA_STR-DB_CREATDAT sy-vline 
WA_DB02N_DATA_STR-DB_SYSTEM sy-vline 
WA_DB02N_DATA_STR-DB_SIZE sy-vline 
WA_DB02N_DATA_STR-DB_TOT_PER_USED sy-vline 
WA_DB02N_DATA_STR-DB_TOT_FREE sy-vline 
WA_DB02N_DATA_STR-DB_TOT_SIZE sy-vline 
WA_DB02N_DATA_STR-DB_FREE sy-vline 
WA_DB02N_DATA_STR-DB_PER_USED sy-vline 
WA_DB02N_DATA_STR-US_NUM sy-vline 
WA_DB02N_DATA_STR-US_MAX_SIZE sy-vline 
WA_DB02N_DATA_STR-US_MAX_SIZE_WHO sy-vline 
WA_DB02N_DATA_STR-US_MAX_OBJ sy-vline 
WA_DB02N_DATA_STR-US_MAX_OBJ_WHO sy-vline 
WA_DB02N_DATA_STR-TS_NUM sy-vline 
WA_DB02N_DATA_STR-TS_MAX_SIZE sy-vline 
WA_DB02N_DATA_STR-TS_MAX_SIZE_WHO sy-vline 
WA_DB02N_DATA_STR-TS_MIN_FREE sy-vline 
WA_DB02N_DATA_STR-TS_MIN_FREE_WHO sy-vline 
WA_DB02N_DATA_STR-TS_MAX_FILES sy-vline 
WA_DB02N_DATA_STR-TS_MAX_FILES_WHO sy-vline 
WA_DB02N_DATA_STR-TS_DICT sy-vline 
WA_DB02N_DATA_STR-TS_DICT_WHO sy-vline 
WA_DB02N_DATA_STR-SE_TAB_NUM sy-vline 
WA_DB02N_DATA_STR-SE_TAB_SIZE sy-vline 
WA_DB02N_DATA_STR-SE_TAB_NUM_M100 sy-vline 
WA_DB02N_DATA_STR-SE_TAB_NUM_COMP sy-vline 
WA_DB02N_DATA_STR-SE_TAB_NUM_NOLOG sy-vline 
WA_DB02N_DATA_STR-SE_TAB_NUM_CRIT sy-vline 
WA_DB02N_DATA_STR-SE_TAB_NUM_M_DB sy-vline 
WA_DB02N_DATA_STR-SE_TAB_NUM_M_R3 sy-vline 
WA_DB02N_DATA_STR-SE_IND_NUM sy-vline 
WA_DB02N_DATA_STR-SE_IND_SIZE sy-vline 
WA_DB02N_DATA_STR-SE_IND_NUM_M100 sy-vline 
WA_DB02N_DATA_STR-SE_IND_NUM_COMP sy-vline 
WA_DB02N_DATA_STR-SE_IND_NUM_NOLOG sy-vline 
WA_DB02N_DATA_STR-SE_IND_NUM_CRIT sy-vline 
WA_DB02N_DATA_STR-SE_IND_NUM_M_DB sy-vline 
WA_DB02N_DATA_STR-SE_IND_NUM_M_R3 sy-vline 
WA_DB02N_DATA_STR-SE_OTH_NUM sy-vline 
WA_DB02N_DATA_STR-SE_OTH_SIZE sy-vline 
WA_DB02N_DATA_STR-SE_OTH_NUM_M100 sy-vline 
WA_DB02N_DATA_STR-SE_OTH_NUM_COMP sy-vline 
WA_DB02N_DATA_STR-SE_OTH_NUM_NOLOG sy-vline 
WA_DB02N_DATA_STR-SE_OTH_NUM_CRIT sy-vline 
WA_DB02N_DATA_STR-SE_OTH_NUM_M_DB sy-vline 
WA_DB02N_DATA_STR-SE_OTH_NUM_M_R3 sy-vline 
WA_DB02N_DATA_STR-SE_TOT_NUM sy-vline 
WA_DB02N_DATA_STR-SE_TOT_SIZE sy-vline 
WA_DB02N_DATA_STR-SE_TOT_NUM_M100 sy-vline 
WA_DB02N_DATA_STR-SE_TOT_NUM_COMP sy-vline 
WA_DB02N_DATA_STR-SE_TOT_NUM_NOLOG sy-vline 
WA_DB02N_DATA_STR-SE_TOT_NUM_CRIT sy-vline 
WA_DB02N_DATA_STR-SE_TOT_NUM_M_DB sy-vline 
WA_DB02N_DATA_STR-SE_TOT_NUM_M_R3 sy-vline 
WA_DB02N_DATA_STR-AGG_TAB_NUM sy-vline 
WA_DB02N_DATA_STR-AGG_TAB_CREATED sy-vline 
WA_DB02N_DATA_STR-AGG_TAB_SIZE sy-vline 
WA_DB02N_DATA_STR-AGG_TAB_PART sy-vline 
WA_DB02N_DATA_STR-AGG_TAB_LOBS sy-vline 
WA_DB02N_DATA_STR-AGG_TAB_NUM_M100 sy-vline 
WA_DB02N_DATA_STR-AGG_TAB_NUM_CRIT sy-vline 
WA_DB02N_DATA_STR-AGG_TAB_NUM_COMP sy-vline 
WA_DB02N_DATA_STR-AGG_TAB_NUM_NOLOG sy-vline 
WA_DB02N_DATA_STR-AGG_IND_NUM sy-vline 
WA_DB02N_DATA_STR-AGG_IND_CREATED sy-vline 
WA_DB02N_DATA_STR-AGG_IND_SIZE sy-vline 
WA_DB02N_DATA_STR-AGG_IND_PART sy-vline 
WA_DB02N_DATA_STR-AGG_IND_LOBS sy-vline 
WA_DB02N_DATA_STR-AGG_IND_NUM_M100 sy-vline 
WA_DB02N_DATA_STR-AGG_IND_NUM_CRIT sy-vline 
WA_DB02N_DATA_STR-AGG_IND_NUM_COMP sy-vline 
WA_DB02N_DATA_STR-AGG_IND_NUM_NOLOG sy-vline 
WA_DB02N_DATA_STR-AGG_OTH_NUM sy-vline 
WA_DB02N_DATA_STR-AGG_OTH_CREATED sy-vline 
WA_DB02N_DATA_STR-AGG_OTH_SIZE sy-vline 
WA_DB02N_DATA_STR-AGG_OTH_PART sy-vline 
WA_DB02N_DATA_STR-AGG_OTH_LOBS sy-vline 
WA_DB02N_DATA_STR-AGG_OTH_NUM_M100 sy-vline 
WA_DB02N_DATA_STR-AGG_OTH_NUM_CRIT sy-vline 
WA_DB02N_DATA_STR-AGG_OTH_NUM_COMP sy-vline 
WA_DB02N_DATA_STR-AGG_OTH_NUM_NOLOG sy-vline 
WA_DB02N_DATA_STR-AGG_TOT_NUM sy-vline 
WA_DB02N_DATA_STR-AGG_TOT_CREATED sy-vline 
WA_DB02N_DATA_STR-AGG_TOT_SIZE sy-vline 
WA_DB02N_DATA_STR-AGG_TOT_PART sy-vline 
WA_DB02N_DATA_STR-AGG_TOT_LOBS sy-vline 
WA_DB02N_DATA_STR-AGG_TOT_NUM_M100 sy-vline 
WA_DB02N_DATA_STR-AGG_TOT_NUM_CRIT sy-vline 
WA_DB02N_DATA_STR-AGG_TOT_NUM_COMP sy-vline 
WA_DB02N_DATA_STR-AGG_TOT_NUM_NOLOG sy-vline      INTO ld_text SEPARATED BY SPACE.

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