随机生成主键

  insert into xlzx_nrwh

      (NRZJ,
       CDZID,
       BT,
       NR,
       FBSJ,
       FBR,
       SFZD,
       FBZT,
       SYXSTP,
       SYTPLX,
       SSBM,
       GCDZJ,
       CJR,
       CJSJ,
       XGR,
       XGSJ,
       YDCS,
       URL,
       FJ)
      SELECT floor(dbms_random.value(0,100))||NRZJ,
             CDZID,
             BT,
             NR,
             FBSJ,
             FBR,
             SFZD,
             FBZT,
             SYXSTP,
             SYTPLX,
             SSBM,
             8,
             CJR,
             CJSJ,
             XGR,
             XGSJ,
             YDCS,
             URL,
             FJ
        FROM xlzx_nrwh WHERE gcdzj = 7

 floor(dbms_random.value(0,100)) 随机生成0到100之间的数据，并且四舍五入取值