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## How do you calculate the difference between two different dates?

Explorer

HI all,

I've read many articles in Splunk community to find out how to calculate different dates. I get the correct result putting the date into the eval syntax but no success informing my fields into variables in eval syntax. Can anyone help me solve this problem?

My log is a JSON, I converted the date with strftime and strptime to get the format as "%d-%B-%y".

Follow below for my syntaxes, the first one is the one I'm working to solve and second one is the syntax that i got the correct result informing the date instead of field:

``````| rename fields.created as createdtime, key as Ticket, fields.updated as updatedtime
| eval created=strftime(strptime(createdtime,"%Y-%m-%dT%H:%M:%S.%3N"),"%d-%B-%y")
| eval last_time=strftime(strptime(updatedtime,"%Y-%m-%dT%H:%M:%S.%3N"),"%d-%B-%y")
| eval diff=(last_time-created) | eval diff = round(diff/60/60/24)
| search Ticket=ACSD-12754
| eventstats values(Ticket) as Ticket
| table Ticket,fields.status.name,diff,created, last_time
``````

``````| eval created="26-October-18"
| eval triaged="29-October-18"
| eval dt_created=strptime(created, "%d-%B-%y") |  eval last_date=strptime(triaged, "%d-%B-%y")
| eval diff=(last_date-dt_created)
| eval diff = round(diff/60/60/24)
| table created triaged diff | dedup created, triaged
``````

1 Solution
SplunkTrust

@wagnerlucena,

In your first search , calculate the difference in epoch (strptime) format before you convert it to string using strftime,

Try

``````| rename fields.created as createdtime, key as Ticket, fields.updated as updatedtime
| eval created=strptime(createdtime,"%Y-%m-%dT%H:%M:%S.%3N")
| eval last_time=strptime(updatedtime,"%Y-%m-%dT%H:%M:%S.%3N")
| eval diff=(last_time-created) | eval diff = round(diff/60/60/24)
| search Ticket=ACSD-12754
| eventstats values(Ticket) as Ticket
| table Ticket,fields.status.name,diff,created, last_time *
``````
Happy Splunking!
SplunkTrust

@wagnerlucena,

In your first search , calculate the difference in epoch (strptime) format before you convert it to string using strftime,

Try

``````| rename fields.created as createdtime, key as Ticket, fields.updated as updatedtime
| eval created=strptime(createdtime,"%Y-%m-%dT%H:%M:%S.%3N")
| eval last_time=strptime(updatedtime,"%Y-%m-%dT%H:%M:%S.%3N")
| eval diff=(last_time-created) | eval diff = round(diff/60/60/24)
| search Ticket=ACSD-12754
| eventstats values(Ticket) as Ticket
| table Ticket,fields.status.name,diff,created, last_time *
``````
Happy Splunking!
Explorer

I converted it into epoch time, but got the same result. I mean, the diff is not being calculating. Take a look the picture.

SplunkTrust

@wagnerlucena, that's because your created and last_time are multivalue field.

Try replacing the variables by

`````` | eval created=strptime(mvindex(createdtime,0),"%Y-%m-%dT%H:%M:%S.%3N")
| eval last_time=strptime(mvindex(updatedtime,0),"%Y-%m-%dT%H:%M:%S.%3N")
``````
Happy Splunking!
Explorer

Hi @renjith.nair you rock! Thanks for support, now i'm able get the difference. I'll adjust my query to retrieve the results that i'm looking for. Thanks again.

SplunkTrust

@wagnerlucena,
You are welcome. Glad that it worked. You may upvote the answer/comment if it's useful for others 🙂

Happy Splunking!
Explorer

can you please mention the final formula that you have used, I am looking for the same but not able to get the difference between two dates

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