Which will give you that time on the first day of the current month. Preserving a comment from if you actually want a date data type result then you can convert the number to a string without any separator and then convert from that to a date: to_date(to_char(your_column, '00V00'), 'HH24MI') To convert from Hours Minutes and Seconds to decimal time, enter values in the top boxes, then click the Convert Hours, Minutes and Seconds to Decimal Time. That's the danger of using an inappropriate data type though. The string would give you '09:60' and '25:30', while the interval would give you '0 10:00:00' and '1 01:30:00', which is slightly more sensible perhaps. Either of the queries above will handle that to some extent - at least, up to 99.99 for the first one - but won't necessarily give useful results. + numtodsinterval(100 * mod(your_column, 1), 'MINUTE')Īt some point you'll run into problems if you have values that don't really represent valid times - for example, 9.60 or 25.3. Provides time zone conversions taking into account Daylight Saving Time (DST), local time zone and accepts present, past, or future dates. Or you can convert to that time on a nominal date if you prefer, e.g.: date '' Time Zone Converter Time Difference Calculator. + numtodsinterval(100 * mod(time, 1), 'MINUTE') as new_time If you actually want an interval data type result then you can use the same split with trunc/mod but handle the two numbers differently: select time, 45 minutes is 45 minutes (1 hour / 60 minutes) 45/60 hours 0.75 hours.
To_char(time, 'FM00D00', 'NLS_NUMERIC_CHARACTERS=:,') as new_time2 To convert time to just hours: 2 hours is 2 hours (1 hour/ 1 hour) 2 hours. Or more simply, format the whole number as a single string in one step, by telling it to use a colon as the decimal separator (with anything as the group separator - that isn't used): to_char(your_column, 'FM00D00', 'NLS_NUMERIC_CHARACTERS=:,')ĭemo with sample data in a CTE: - CTE for sample data
That gives you two numbers you can format those and concatenate them, again assuming you want a string result, e.g.: to_char(trunc(your_column), 'FM00') ||':' || to_char(100 * mod(your_column, 1), 'FM00') Once you have two times in the same unit of time measurement, such as hours, you can perform mathematic operations on them like regular numbers.Assuming those are numeric values, you can get the hour part with trunc(your_column) and the minutes part with 100 * mod(your_column, 1). You can derive formulas for decimal minutes and seconds in the same way:ĭecimal minutes = (hh * 60) + mm + (ss / 60)ĭecimal seconds = (hh * 3600) + (mm * 60) + ss Similarly, for seconds we divide by 3600, as there are 60 seconds in a minute and 60 minutes in an hour ( 60 * 60 = 3600). There are 60 minutes in an hour, so we divide the number of minutes by 60 to convert minutes to decimal hours. 60 seconds in a minute 60 minutes in an hour. The way we measure time now around the world is using a base 60 system. ss is the seconds component of the time. (Decimal time) When people think of the metric system they think of worldwide units of measurement such as distance, mass, volume and so on.mm is the minutes component of the time and.The formula for decimal hours is, therefore:ĭecimal hours = hh + (mm / 60) + (ss / 3600) Therefore you need to convert the minutes and seconds values to hours, and add these results to the number of hours. Say you want to know the time in only hours. The basic principle of converting time to decimal time is quite straightforward.