Did some looking around and did not see anything on this, building an expression in EG 7.1.
Trying to figure out how to create a new MonthYr date value variable from a time date a stamp.
MDY(MONTH(date_variable),1,YEAR(date_variable)
Have used the above code in the past when it is a mm/dd/yy stamp, the time part is throwing me off, how do I build in the DatePart? I could do it in 2 steps but I'm sure there is a way to make it 1
Use
datepart(intnx("DTMONTH", date_variable, 0))
Congratulations! I believe this is a first. You actually solved your problem in your own query!
The DATEPART function: Extracts the date from a SAS datetime value.
Tom
And I bet I can make a custom format that works directly with a datetime variable so that for many purposes no new variable is needed at all.
But I am not sure what your desired "monthyr" would look like.
Perhaps I'm missing something
/* Create_MonthYr */
(DATEPART(t1.created_at)) FORMAT=MONYY7. LABEL="Create_MonthYr" AS Create_MonthYr,
This gives me a JAN2018 format but it still has a SAS value associated with multiple days 01/01/2018, 01/02/2018, 01/03/2018 etc. this makes it more difficult to do some basic reporting like aggregating transaction counts by monthyr across other variables.
Creating a common month year SAS date value will enable this aggregation. I've done this before with MDY function when it is a date, looking for a solution for time date
@RickyS wrote:
Perhaps I'm missing something
/* Create_MonthYr */
(DATEPART(t1.created_at)) FORMAT=MONYY7. LABEL="Create_MonthYr" AS Create_MonthYr,
This gives me a JAN2018 format but it still has a SAS value associated with multiple days 01/01/2018, 01/02/2018, 01/03/2018 etc. this makes it more difficult to do some basic reporting like aggregating transaction counts by monthyr across other variables.
Creating a common month year SAS date value will enable this aggregation. I've done this before with MDY function when it is a date, looking for a solution for time date
I think you need to explain what the difficulty is with your aggregating. Almost every procedure will create groups based on the formatted value of a variable as defined in the proc.
SAS may not supply the exact datetime format you want but proc format with a Picture format will allow a great deal of customization.
data junk; do date='03OCT2017:01:23:27'dt to '15JAN2018:18:24:16'dt by 1385; value = rand('uniform'); output; end; run; proc format library=work; picture dtmonyr (default=7) low-high='%b%Y' (datatype=datetime) ; run; proc means data=junk mean max std; class date; format date dtmonyr.; var value ; run;
Did it as 2 steps
DATEPART(t1.date)
MDY(month(t1.date),1,year(t1.date))
this converts everything to 1st date of each month
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