DAY (SSIS Expression)

date

Is an expression that returns a valid date or a string in date format.

DT_I4

DAY returns a null result if the argument is null.

A date literal must be explicitly cast to one of the date data types. For more information, see Integration Services Data Types.

Note
The expression fails to validate when a date literal is explicitly cast to one of these date data types: DT_DBTIMESTAMPOFFSET and DT_DBTIMESTAMP2.

Using the DAY function is briefer but equivalent to using DATEPART("Day", date).

This example returns the number of the day in a date literal. If the date format is in "mm/dd/yyyy" format, this example returns 23.

DAY((DT_DBTIMESTAMP)"11/23/2002")

This example returns the integer that represents the day in the ModifiedDate column.

DAY(ModifiedDate)

This example returns the integer that represents the day of the current date.

DAY(GETDATE())

Reference

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