Question

We have a configuration table as shown below that stores the start time and the duration.
If the start time is 9:20 pm (3rd one ) add the duration then the time becomes 9:35.
I have to find out if the current time is in between any of the values.
I have to return the output based on the start_time and duration. i.e current time should be between start_time and the start_time + duration. (between 09:20 and and 09:35)
Can you please help me with the sql query or is it better if we go with sql function?

Start_time, duration(minutes)   output

1108                 5            2

1054                100           5

2120                15            8

Answer 1

I’m not a fan of storing dates and times in VARCHAR2 columns. START_TIME should really be a DATE or a TIMESTAMP column.

That said, you can do something like

 with x as (
   select '1108' start_time, 5 duration, 2 output from dual
   union all
   select '1054', 100, 5 from dual
   union all
   select '2120', 15, 8 from dual
 )
 select *
   from (
     select to_date(
               to_char(sysdate,'YYYY-MM-DD') || ' ' ||
                 start_time,
               'YYYY-MM-DD HH24MI' ) start_date,
            to_date(
               to_char(sysdate,'YYYY-MM-DD') || ' ' ||
                 start_time,
               'YYYY-MM-DD HH24MI' ) + duration/24/60 end_date
   from x)
  where sysdate between start_date and end_date