How to store data in a variable in select query

Question

Hi,
Below is the select query in which i want to store the data in variable but i am getting runtime error as the fields are more as compared to variable,the declaration is necessary for it due to the reteriving for data.
Please provide me guidelines how to do it.
DATA: BEGIN OF ITSC01 OCCURS 0,
      PRUEFLOS LIKE QALS-PRUEFLOS,
      MBLNR LIKE QAMB-MBLNR,
      LGORT LIKE MSEG-LGORT,
      END OF ITSC01.
IF STIT-MGEIG GE 0.
LOOP AT STIT." WHERE PRUEFLOS EQ STIT-PRUEFLOS.
    SELECT A~PRUEFLOS B~MBLNR C~LGORT FROM QALS AS A
           INNER JOIN QAMB AS B ON B~PRUEFLOS = A~PRUEFLOS
           INNER JOIN MSEG AS C ON C~MBLNR = B~MBLNR AND C~MJAHR = B~MJAHR
           INTO SLOC WHERE A~PRUEFLOS EQ STIT-PRUEFLOS.
*           INTO TABLE ITSC01 WHERE A~PRUEFLOS EQ STIT-PRUEFLOS AND A~MATNR EQ STIT-MATNR AND C~LGORT EQ 'SC03'.
    SORT ITSC01 BY PRUEFLOS.
     READ TABLE ITSC01 WITH KEY PRUEFLOS = ITSC01-PRUEFLOS.
      IF ITSC01-LGORT EQ 'SC03'.
      STIT-MGEIG = 0.
      ENDIF.
MODIFY STIT.
ENDLOOP.
ENDIF.

Answer 1

hmm..
try this:
DATA: l_PRUEFLOS LIKE QALS-PRUEFLOS,
          l_MBLNR LIKE QAMB-MBLNR,
         l_LGORT LIKE MSEG-LGORT,
IF STIT-MGEIG GE 0.
LOOP AT STIT." WHERE PRUEFLOS EQ STIT-PRUEFLOS.
    SELECT APRUEFLOS BMBLNR C~LGORT FROM QALS AS A
           INNER JOIN QAMB AS B ON BPRUEFLOS = APRUEFLOS
           INNER JOIN MSEG AS C ON CMBLNR = BMBLNR AND CMJAHR = BMJAHR
           INTO ( l_PRUEFLOS , l_MBLNR, l_LGORT )
      WHERE A~PRUEFLOS EQ STIT-PRUEFLOS.
          INTO TABLE ITSC01 WHERE APRUEFLOS EQ STIT-PRUEFLOS AND AMATNR EQ STIT-MATNR AND C~LGORT EQ 'SC03'.
    SORT ITSC01 BY PRUEFLOS.
     READ TABLE ITSC01 WITH KEY PRUEFLOS = ITSC01-PRUEFLOS.
      IF ITSC01-LGORT EQ 'SC03'.
      STIT-MGEIG = 0.
      ENDIF.
MODIFY STIT.
ENDLOOP.
ENDIF.