How add an time to date function

Question

Hai all
How to add time to date function
My table called Daily_attend
Fields are
Name varchar
Empcode num
Intime date
Outtime date
Attend_date date
So now i can calculate the working Hours of an employees by subtracting
Outtime -Intime
I have fixed the intime as 0815 after 0815 coming will be account to late
So when the shift start late by 50 min now i need to add 50 min to the to start time
so the intime of all employee should be subtract with 0905
Thanks In Advance
Srikkanth.M

Answer 1

Are you looking for something similar?
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL> create table test1(intime date, outtime date, empid integer, idein number);
Table created.
SQL> insert into test1 values(to_date('12-Mar-2010 08:15:00','DD-Mon-YYYY HH24:MI:SS'), to_date('12-
Mar-2010 18:15:00','DD-Mon-YYYY HH24:MI:SS'),101,null);
1 row created.
SQL> create table test2(late_mins integer);
Table created.
SQL> insert into test2 values (40);
1 row created.
SQL> update test1
  2  set idein = to_number(outtime-(intime+(select (late_mins/60)/24 from test2)))*24*60
  3  where empid = 101;
1 row updated.
SQL> select * from test1;
INTIME    OUTTIME        EMPID      IDEIN
12-MAR-10 12-MAR-10        101        560
SQL>