幽门四联疗法 副作用:VSAM - SAMPLE - RRDS - REWRITE & DELETE

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FILE-CONTROL.                             
    SELECT EMP-FILE ASSIGN TO EMPFIL      
      ORGANIZATION   IS RELATIVE          
      ACCESS MODE    IS DYNAMIC           
      RELATIVE KEY   IS RN1               
      FILE STATUS    IS WS-EMPFIL-STATUS.  WORKING-STORAGE SECTION.      01 WS-WORK-AREA.   
     05 RN1                  PIC 9(3).    PROCEDURE DIVISION.          OPEN I-O   EMP-FILE. * * RANDOM REWRITE *       MOVE 2 TO  RN1                                                 -> NO NEED READ FILE       MOVE 'LUO ZHONG JUN' TO EMP-NAME          REWRITE  EMP-FILE-REC * RANDAM  DELETE      MOVE 3 TO RN1                                                   -> NO NEED READ FILE      DELETE EMP-FILE       CLOSE EMP-FILE. 
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