Row wise date calculation

Question

Hello all the seniors, i am using Oracle 10g & Form 6i;
create table empl
(code varchar2(4), dob date);
insert into empl values ('1095',to_date('12/02/1960','dd/mm/yyyy');
insert into empl values ('1098',to_date('02/09/1952','dd/mm/yyyy');
insert into empl values ('1099',to_date('28/04/1956','dd/mm/yyyy');
insert into empl values ('1104',to_date('16/02/1965','dd/mm/yyyy');
insert into empl values ('1115',to_date('02/02/1966','dd/mm/yyyy');
insert into empl values ('1116',to_date('23/02/1956','dd/mm/yyyy');
insert into empl values ('1786',to_date('07/05/1974','dd/mm/yyyy');
insert into empl values ('1721',to_date('14/01/1983','dd/mm/yyyy');
I want the query result to be like this;
CODE     DOB        AGE YMD      Round Y/M MX  Y/M     MNTHS
1095   12/02/1960  49/10/11        49/10       60   10/2    122
1098   02/09/1952  57/03/21        57/4       60     2/8      32
1099   28/04/1956  53/07/25        53/8       60     6/4      76
1104   16/02/1965  44/10/07        44/10       60    15/2    182
1115   02/02/1966  43/10/21        43/11       60    16/1    193
1116   23/02/1956  53/10/00        53/10       60     6/2      74
1786   07/05/1974  35/07/16        35/8       60    24/4    292
1721   14/01/1983  26/11/09    26/11       60    33/1    397AGE YMD should be calculated upto sysdate.
Y/M = MX - Round YM
MNTHS = Y/M * 12
please help.
TY & regards.

Answer 1

Merry Christmas!
If you like Ravikumar's solution, but you like Blushadow's formatting better, then compare how Ravikumar and Blushadow use TO_CHAR differently, and do what Blushadow does.
It helps if you format the code so that you can tell what the arguments to each function are.
You'll notice that Blusadow starts the 2nd argument to TO_CHAR with 'fm', but Ravikumar does not. Normally, TO_CHAR leaves room for a sign in its output; 'fm' tells it not to do that, so you can modify Ravikumar's solution like this:
...to_char ( TRUNC ( months_between (sysdate,d ob)
             / 12
       , 'FM00'     -- FM added
|| '/' 
|| to_char ( mod ( TRUNC ( months_between (sysdate,dob)
           , 12
        , 'FM00'     -- FM added
|| '/' 
|| to_char ( ROUND ( sysdate
             - add_months ( dob
                    , floor (months_between (sysdate, dob))     -- Don't use TO_CHAR here
        , 'FM00'     -- FM added
     )      AS "AGE YMD",WITH clauses are very useful, and a great programming practice. If your version of Forms doesn't allow them, then you can write a view using a WITH clause in the database, and simply wuery the view within forms.
If you really have to avoid the WITH clause, you can usually re-write it using in-line views.
For example:
select code, dob, age_ymd
      ,case when round_m = 13 then to_char(yr+1,'fm09')||'/00'
       else to_char(yr,'fm09')||'/'||to_char(round_m,'fm09')
       end as round_y_m
      ,mx
      ,to_char(mx-(yr+1),'fm09')||'/'||to_char(case when round_m = 13 then 0
                                               else 12-round_m
                                               end
                                              ,'fm09') as y_m
      ,((mx-(yr+1))*12)+case when round_m = 13 then 0 else 12-round_m end as mnths
from      (     -- Begin in-line view t3
        select code, dob
                  ,to_char(yr,'fm09')||'/'||to_char(mt,'fm09')||'/'||to_char(dy,'fm09') as age_ymd
                  ,case when mt in (1,3,5,7,8,10,12) then case when dy <= 15 then mt else mt+1 end
                   when mt in (4,6,9,11) then case when dy < 15 then mt else mt+1 end
                   else case when dy < 14 then mt else mt+1 end
                  end as round_m
                 ,60 as mx
                 , yr, mt, dy
            from      (     -- Begin in-line view t2
                          select code, dob, yr, mt
                                ,case when dy < 0 then
                                   case when mt in (1,3,5,7,8,10,12) then 31+dy-1
                                        when mt in (4,6,9,11) then 30+dy-1
                                   else 28+dy-1
                                   end
                                 else dy end as dy
                          from     (     -- Begin in-line view t
                      select code, dob
                                         ,to_number(to_char(sysdate,'YYYY'))-to_number(to_char(dob,'YYYY')) as yr
                                         ,floor(mod(months_between(sysdate, dob),12)) as mt
                                         ,to_number(to_char(sysdate,'DD'))-to_number(to_char(dob,'DD')) as dy
                                  from empl
                    )     -- End in-line view t
               )     -- End in-line view t2
     )     -- End in-line view t3
;Start with the main query.
Where Blushadow said
FROM  t3substitute:
FROM    (
            SELECT  ...  -- Put the code of sub-query t3 here
        )but where sub-query t3 originally said
FROM    t2you'll say
FROM    (
            SELECT  ...  -- Put the code of sub-query t2 here
        )and so on.