## How can we get the 15 minutes time interval

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I am trying to fetch every 15min data in such a way that, if the current time is 23-10-19 11:11:30 then I need to get the data from 23-10-19 10:30:59 to 23-10-19 10:45:59 in the same way if the time is 23-10-19 11:15:30 then I need to get the data from 23-10-19 10:45:59 to 23-10-19 11:00:59.

I have tried forgetting the 15min delay but not the way I want to approach. Please suggest me how can we approach the scenario

```select concat(to_char(current_timestamp - numtodsinterval(30,'MINUTE'),'yyyy-mm-dd hh24:mi'),':59') A,
concat(to_char(current_timestamp - numtodsinterval(15,'MINUTE'),'yyyy-mm-dd hh24:mi'),':59') B,
to_char(current_timestamp,'yyyy-mm-dd hh24:mi:ss') C from dual
```

below is the output that I was getting.

```A                   B                   C
------------------- ------------------- -------------------
2019-10-23 13:03:59 2019-10-23 13:18:59 2019-10-23 13:33:22
```

You can truncate to the nearest minute to zero the seconds and then subtract the number of minutes to get back to the nearest 15 minute interval past the hour and then apply your offsets:

```SELECT TRUNC( current_timestamp, 'MI' )
- MOD( EXTRACT( MINUTE FROM current_timestamp ), 15 ) * INTERVAL '1' MINUTE
- INTERVAL '30' MINUTE
+ INTERVAL '59' SECOND AS start_time,
TRUNC( current_timestamp, 'MI' )
- MOD( EXTRACT( MINUTE FROM current_timestamp ), 15 ) * INTERVAL '1' MINUTE
- INTERVAL '15' MINUTE
+ INTERVAL '59' SECOND AS end_time,
current_timestamp
FROM   DUAL
```

Outputs:

```START_TIME          | END_TIME            | CURRENT_TIMESTAMP
:------------------ | :------------------ | :----------------------------
2019-10-23 09:00:59 | 2019-10-23 09:15:59 | 2019-10-23 09:42:53.742684000
```

db<>fiddle here

15 Minute Interval Timer, The leave will be reported in 15 minute increments. (Ex: - 153514. http:// stackoverflow.com/questions/5616600/time-interval-in-15-minutes-increment- format. Although the most common calendar intervals are 15 minutes and 30 minutes, you can also change the time scale interval of your calendar to 5, 6, 10, or 60 minutes. In Calendar, on the View tab, in the Arrangement group, click Time Scale, and then click the grid interval that you want to show in the calendar. Expand your Office skills.

Another solution is this one:

```WITH t AS
(SELECT TRUNC(CURRENT_TIMESTAMP , 'hh') + TRUNC(EXTRACT(MINUTE FROM CURRENT_TIMESTAMP ) / 15) * INTERVAL '15' MINUTE - INTERVAL '30' MINUTE AS Base
FROM dual)
SELECT Base + INTERVAL '59' SECOND AS begin_time,
Base + INTERVAL '15:59' minute to SECOND AS end_time
FROM t;
```

It is based on my generic Interval function:

```CREATE OR REPLACE FUNCTION MakeInterval(ts IN TIMESTAMP, roundInterval IN INTERVAL DAY TO SECOND) RETURN TIMESTAMP DETERMINISTIC IS
denom INTEGER;
BEGIN
IF roundInterval >= INTERVAL '1' HOUR THEN
denom := EXTRACT(HOUR FROM roundInterval);
IF MOD(24, denom) <> 0 THEN
RAISE VALUE_ERROR;
END IF;
RETURN TRUNC(ts) + TRUNC(EXTRACT(HOUR FROM ts) / denom) * denom * INTERVAL '1' HOUR;
ELSIF roundInterval >= INTERVAL '1' MINUTE THEN
denom := EXTRACT(MINUTE FROM roundInterval);
IF MOD(60, denom) <> 0 THEN
RAISE VALUE_ERROR;
END IF;
RETURN TRUNC(ts, 'hh') + TRUNC(EXTRACT(MINUTE FROM ts) / denom) * denom * INTERVAL '1' MINUTE;
ELSE
denom := EXTRACT(SECOND FROM roundInterval);
IF MOD(60, denom) <> 0 THEN
RAISE VALUE_ERROR;
END IF;
RETURN TRUNC(ts, 'mi') + TRUNC(EXTRACT(SECOND FROM ts) / denom) * denom * INTERVAL '1' SECOND;
END IF;
END MakeInterval;
```

You would invoke it as

```SELECT MakeInterval(CURRENT_TIMESTAMP, INTERVAL '15' MINUTE) from dual;
```

plus/minus your constant offsets.

calculating times in 15 minute increments, For data that's in POSIXct format, you can use the cut function to create 15-minute groupings, and then aggregate by those groups. The code  The smallest interval the drop-downs will display is 30 minutes. You can manually enter any start or end time you wish in the fields of the form. You can also set the time scale for 15 minutes. Click View>View Settings>Other Settings and change the Time scale drop-down.

```select :start_date + (1/96)*(level-1) from dual connect by level < :intervals
```

Create a time interval of 15 minutes from minutely data in R?, Super easy to set the on/off time sequences via pull-tabs (pull to out-position to set OFF times in 30 min intervals). just \$7.99 at local Orchard Supply Hardware. Hello All, I need to create15-minute intervals specifically from 500 hrs - 2400 hrs (500-515, 515-530 and so on). I am able to have an hour time interval but could not figure out to how to create it for 15 minutes.

Outdoor Timer With 15 Minute Increments: Amazon.com, BN-LINK Short Period Repeat Cycle Intermittent Timer, Interval Timer - Day, Night , Timer Switch for bathroom fans and household lights, 1-5-10-15-20-30 Min  The most common option is to round to the nearest 15 minute interval, as paying for a quarter of an hour is often the easiest option for payroll systems. If you go this route, be aware that there are restrictions on when you can round up versus when you can round down (known as the 7 minute rule).

Repeat Timer: Amazon.com, Using the start time, how can I populate each 15-minute interval with the duration, decremented 15-minutes each time? I can't envision how this  Coming in early or late to not engage in work will not result in payment. Time can be rounded up or down to the nearest five minutes, one-tenth an hour (six minutes), or 15 minutes. Rounding time up or down cannot result in failing to pay employees accurately over time.

Solved: 15-Minute Intervals: Distribution of Minutes, In this program you can get list of in time interval with fixed difference Ex: 15 minute in AM and PM format. Example Output 00:00 AM 00:15 AM  SYSTIMESTAMP - INTERVAL '15' MINUTE You can also use a DATE in many places where a TIMESTAMP is expected, for example, in a date arithmetic operation with an INTERVAL, so the following would also work: SYSDATE - INTERVAL '15' MINUTE but it's probably more efficient to SAY SYSDATE - (15 / (24 * 60)) as you're already doing. user12207320 wrote