date time to date format

[alexdsa310]

i have a datetime format variable "2016-09-20T08:29" which is character format and another date "2016-05-04" character.

I need to check if both the dates are same for each record and using the code below.

proc sql;
create table rand_date as
select a.usubjid,a.RFSTDTC,b.SCDTC
from sdtm.dm a left join sdtm.sc b
on a.usubjid=b.usubjid
where (a.ARMCD ne "SCRNFAIL") and a.RFSTDTC ne b.SCDTC;
quit;

But due to different date formats it is not working.

can any one suggest how to proceed.

[RW9 · Accepted solution]

If they are both strings then this is simple string manipulation:

where (a.ARMCD ne "SCRNFAIL") and substr(a.RFSTDTC,1,10) ne b.SCDTC;

If they are a numeric date-time and a date then simply:

where (a.ARMCD ne "SCRNFAIL") and datepart(a.RFSTDTC) ne b.SCDTC;