Oracle SQL语句查找两个时间戳列之间具有输入时间戳的行

Question

I have a table in Oracle DB

|SHIFT|     START_TIME (TIMESTAMP)     |      END_TIME (TIMESTAMP)      |
|  2  |  01-AUG-15 11.00.00.000000 PM  |  02-AUG-15 08.00.00.000000 AM  |
|  4  |  01-AUG-15 07.00.00.000000 AM  |  01-AUG-15 04.00.00.000000 PM  | 
|  3  |  01-AUG-15 02.00.00.000000 AM  |  01-AUG-15 11.00.00.000000 AM  | 
|  1  |  01-AUG-15 02.00.00.000000 PM  |  01-AUG-15 11.00.00.000000 PM  | 
|  5  |  01-AUG-15 08.30.00.000000 AM  |  01-AUG-15 05.30.00.000000 PM  | 

I want those row(s) to be returned which correspond to a particular timestamp. Running the following query works:

select shift, 
  cast(start_time as time), 
  cast(end_time as time)
from mytable 
where cast('12.00.00.000000 PM' as time) 
  between cast(start_time as time) and
  cast(end_time as time);

BUT, the same query does not work for cast('12.00.00.000000 AM ' as time) ie the following query does not work. It returns 0 rows. What am I doing wrong?

select shift, 
  cast(start_time as time), 
  cast(end_time as time)
from mytable 
where cast('12.00.00.000000 AM' as time) 
  between cast(start_time as time) and
  cast(end_time as time);

I even tried with the match between start_time and the start_time + 9hours but get the same behavior.

select shift,
cast(start_time as time), 
cast((start_time + numtodsinterval(9,'HOUR')) as time) 
from ata_ipd_web_shifts where cast('12.00.00.000000 PM' as time) 
BETWEEN  cast(start_time as time) AND 
cast((start_time + numtodsinterval(9,'HOUR')) as time);

So what is the issue here and what is the best way to extract the desired row(s)?

Answer 1

Make the time of day you want to check for an INTERVAL and add it to both the start date of the shift and the end date of the shift. Like this:

with d as ( SELECT 2 shift, to_timestamp('01-AUG-15 11.00.00.000000 PM') start_date, to_timestamp('02-AUG-15 08.00.00.000000 AM') end_date from dual
UNION ALL SELECT 4 shift, to_timestamp('01-AUG-15 07.00.00.000000 AM'), to_timestamp('01-AUG-15 04.00.00.000000 PM') from dual
UNION ALL SELECT 3 shift, to_timestamp('01-AUG-15 02.00.00.000000 AM'), to_timestamp('01-AUG-15 11.00.00.000000 AM') from dual
UNION ALL SELECT 1 shift, to_timestamp('01-AUG-15 02.00.00.000000 PM'), to_timestamp('01-AUG-15 11.00.00.000000 PM') from dual
UNION ALL SELECT 5 shift, to_timestamp('01-AUG-15 08.30.00.000000 AM'), to_timestamp('01-AUG-15 05.30.00.000000 PM') from dual
)
select * from d
where trunc(start_date)+TO_DSINTERVAL('0 09:00:00') between start_date and end_date
OR trunc(end_date)+TO_DSINTERVAL('0 09:00:00') between start_date and end_date

Note that the interval is 24-hour time, so midnight (that you used in your example) is 0 00:00:00.