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How do you find the difference between two dates in Shell?
5 Answers. There’s a solution that almost works: use the %s date format of GNU date, which prints the number of seconds since 1970-01-01 00:00. These can be subtracted to find the time difference between two dates. Because of daylight savings time, there are only 23 hours between those times.
How do I subtract a day from a date in SQL?
To get yesterday’s date, you need to subtract one day from today’s date. Use GETDATE() to get today’s date (the type is datetime ) and cast it to date . In SQL Server, you can subtract or add any number of days using the DATEADD() function. The DATEADD() function takes three arguments: datepart , number , and date .
How to subtract number of days from date in Bash?
I want to subtract “number of days” from a date in bash. I am trying something like this .. You are specifying the date incorrectly. Instead, say: If you need to store it in a variable, use $ (…):
How to subtract two timestamps in bash script?
Note that the %N format specifier (nanoseconds) is a GNU extension and is not handled in the default macOS date command. Either (a) brew install coreutils and use gdate in the function above or (b) use this alternative function on macOS (but note it lacks support for sub-second measurements):
How to subtract two dates in epoch format?
How can I subtract two dates in epoch format using Shell Scripting. I want the output in Months, Days, Hours format. Also It should work even for more than 12 months ( as I came across few which were resetting to 0 months if more than 12)
How to subtract two time stamps along with their dates?
In general the dates are different every time, that is why cant neglect the dates. Output should be in seconds/minutes. If possible in HH:MM:SS format. You can use date to convert to timestamp which is seconds, subtract the seconds and then convert back to HH:MM:SS.