DATESINPERIOD function

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Description

Returns a table that contains a column of dates that begins with the start_date and continues for the specified number_of_intervals.

Syntax

DATESINPERIOD (<dates>, <start_date>, <number_of_intervals>, <interval>) 

Parameters

Sr.No.	Parameter & Description
1	dates A column that contains dates.
2	start_date A date expression.
3	number_of_intervals An integer that specifies the number of intervals to add to or subtract from the dates.
4	interval The interval by which to shift the dates. The value for interval can be one of the following − year quarter month day

Return Value

A table containing a single column of date values.

Remarks

The dates parameter can be any of the following −

• A reference to a date/time column.

• A table expression that returns a single column of date/time values.

• A Boolean expression that defines a single-column table of date/time values.

Constraints on Boolean expressions −

• The expression cannot reference a calculated field.

• The expression cannot use CALCULATE function.

• The expression cannot use any function that scans a table or returns a table, including aggregation functions.

However, a Boolean expression can use any function that looks up a single value, or that calculates a scalar value.

If the number specified for number_of_intervals parameter is positive, the dates are moved forward in time. If the number is negative, the dates are shifted back in time.

The interval parameter is an enumeration, not a set of strings. Hence, the values for interval should not be enclosed in quotation marks. Also, the values: year, quarter, month, day should be spelled in full when using them.

The result table includes only dates that are specified in the dates parameter.

Example

= CALCULATE ( 
   SUM (Sales [Sales Amount]), 
   DATESINPERIOD (Sales[Date], DATE (2015,1,1),3, MONTH)
)