fun_ora.sql

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----------计算暂住时间--------------------
create or replace function fun_months(as_lbdry0 string)
 return string is
li_months integer;
begin
  li_months := trunc(months_between(sysdate,to_date(as_lbdry0,'yyyymmdd')));
  if li_months = 0 then
     return '1';
  end if;
  if li_months > 0 and li_months <=12 then
     return '2';
  end if;
  if li_months > 12 then
     return '3';
  end if;
end;
/

----------计算来自地区--------------------
create or replace function fun_FROM(as_czhkss string)
 return string is
   ls_fj char(2);       
   ls_city char(2);    
   ls_foreign char(1); 
begin
   ls_fj     :=substr(as_czhkss,1,2);
   ls_city   :=substr(as_czhkss,5,2);
   ls_foreign:=substr(as_czhkss,1,1);
  if ls_foreign = '7' then
     return '5';
  end if;
  if ls_foreign = '9' then
     return '6';
  end if;
  if ls_fj = '35' and (ls_city < '19' or ls_city > '80') then
     return '1';
  end if;
  if ls_fj = '35' and ls_city > '19' and ls_city < '80' then
     return '2';
  end if;
  if ls_fj <> '35' and (ls_city < '19' or ls_city > '80') then
     return '3';
  end if;
  if ls_fj <> '35' and ls_city > '19' and ls_city < '80' then
     return '4';
  end if;
end;
/

create or replace function fun_zzsj(as_lbdry0 string)
 return string is li_months integer;
begin 
  li_months:=trunc(months_between(sysdate,to_date(as_lbdry0,'yyyymmdd')));
  if li_months >= 0 and li_months <= 6 then
     return '1';
  end if;
  if li_months > 6 and li_months <=12 then
     return '2';
  end if;
  if li_months > 12 then
     return '3';
  end if;
end;
/