Oracle中case的第二种用法

  procedure P_GetProVerSingInfo_2018(varFileID in varchar2,
                                     p_cr1     out refcontent,
                                     p_cr2     out refcontent,
                                     p_cr3     out refcontent) as
  begin

    open p_cr1 for
      select *
        from ly_familyinformation
       where file_id = varFileID
         and iszfbtperson = ''
       order by case
                  when relation = '购房人/申请人' then
                   0
                  when relation = '配偶' then
                   1
                  else
                   2
                end,
                applyer;
    open p_cr2 for
    /*
                         财产类型：1：公积金；2：社保；3：企业所得税缴纳情况；
                         4：工商登记情况；5：个人所得税缴纳情况；6：非居住类房屋情况；
                         7：机动车辆登记情况；8：其他财产
                    */
      select case t.propertype
               when '' then
                '公积金'
               when '' then
                '社保'
               when '' then
                '企业所得税'
               when '' then
                '工商登记'
               when '' then
                '个人所得税'
               when '' then
                '非居住类房屋'
               when '' then
                '机动车辆登记'
               when '' then
                '其他财产'
             end propertype,
             t.propertype as rn,
             t.applyer,
             F_ReturnDescription(t.id) DESCRIPTION,
             t.rdjz
        from LY_FAMILYPROPERTY t
       where file_id = varFileID
       order by rn;
    open p_cr3 for
      select * from ly_s_docbase where file_id = varFileID;

  end P_GetProVerSingInfo_2018;