How to write a if else logic expression for this condition

Question

Hai All
I have written some if else logic for for my condition
If the time is betweeb 0145 and 0630 and timeout is a column in a table is null than update sysdate-1
then if time is bet0645 and 0900 then timein is null then insert into timein in table called dail_att
and time bet 1130 and 1300 then if barcode null then insert timein else update timeout
and bet 1645 and1730 then if barcode null and timein null then insert timein or update time out
this is my condition for generating attendance. Ive tried some logic and pls tell case executed faster than ifelse logic
and give me a soluton
This is my coding
if :bartime between 0145 and 0630 and :barcode is not null then
update dail_att
set timeout = :bartime
where barcode= :barcode
and timein is not null
and ATTEND_DATE = :BARDATE-1;
else if :bartime between 0645 and 0900 and :barcode is null then
insert into dail_att(barcode,timein,attend_date)
values(:barcode,:bartime,:bardate);
else if     :bartime between 1145 and 1300 and :barcode is null then
     insert into dail_att(barcode,timein,attend_date)
values(:barcode,:bartime,:bardate);
else
     update dail_att
set timeout = :bartime
where barcode= :barcode
and ATTEND_DATE = :BARDATE ;
end if;
else if :bartime between 1645 and 1730 and :barcode is null then
          insert into dail_att(barcode,timein,attend_date)
values(:barcode,:bartime,:bardate);
else
     update dail_att
set timeout = :bartime
where barcode= :barcode
and ATTEND_DATE = :BARDATE ;
end if;
else :bartime > 1730 and :barcode is null then
     update dail_att
set timeout = :bartime
where barcode= :barcode
and ATTEND_DATE = :BARDATE ;
end if ;
EXIT WHEN :SYSTEM.LAST_RECORD = 'TRUE' OR :BARCODE IS NULL;
NEXT_RECORD;
forms_ddl('commit');
end loop;
Regards
Srikkanth.M

Answer 1

Hai Sir
I am storing time in 24hrs format and its datatype is varchar.Pls tell me we can write an if else with in a elseif
Regards
Srikkanth.M