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expression function - number of days [2016/09/14 14:19] (current)
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 +====== Number of Days (Expression Function) ======
  
 +===== Purpose =====
 +The **Number of Days** function (NUMBER_DAYS) generates a number of days between two timestamps. ​
 +
 +{{:​number_days_initial.png?​direct&​600|}}
 +
 +===== Parameters =====
 +The **Number of Days** function has three parameters, two of which are required:
 +
 +==== Start Date Timestamp ====
 +
 +Allowed Inputs: [[Field|field]] value or a number representing a Unix timestamp.
 +
 +There are several sources of Unix timestamps available. ​ For example the stored value of a [[Field Type - Date|date]] or [[Field Type - Date Time| date time]] field is a Unix timestamp. ​ Also When using the advanced interface the output of the [[Expression Function - Date|date]] or [[Expression Function - Date and Time| date time]] expression function is a Unix timestamp.
 +
 +==== End Date Timestamp ====
 +
 +Allowed Inputs: [[Field|field]] value or a number representing a Unix timestamp.
 +
 +There are several sources of Unix timestamps available. ​ For example the stored value of a [[Field Type - Date|date]] or [[Field Type - Date Time| date time]] field is a Unix timestamp. ​ Also When using the advanced interface the output of the [[Expression Function - Date|date]] or [[Expression Function - Date and Time| date time]] expression function is a Unix timestamp.
 +
 +==== Timezone ====
 +
 +Allowed Inputs: [[Field|field]] value or a text string
 +
 +The third optional parameter of the **Number of Days** function is a string that represents the timezone to be used when interpreting the timezone. ​ Either use the  query builder to choose a field that contains the value or use type a value to enter a number. ​ The value should be based on the tz (timezone) database used by Linux and other Unix system in the form “Area/​Location” e.g. "​America/​New_York"​. ​ If no value is provided then the current user's timezone is used.
 +
 +===== Output =====
 +
 +The output of the **Number of Days** function is number representing the number of days between two timestamps. ​ If less than 24 hours has elapsed between the two timestamps even if they are on two separate calendar days the result will be 0.
 +
 +===== Example =====
 +
 +For example NUMBER_DAYS('​1305500461',​ '​1305586861'​) will result in '​1'​ and NUMBER_DAYS(1305500461,​1305525461) will result in '​0'​.
expression function - number of days.txt · Last modified: 2016/09/14 14:19 (external edit)
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