topic Select latest dataset file every month in SAS Programming

Select latest dataset file every month

SteelersPitts — Wed, 27 Jun 2018 18:20:54 GMT

Hi All,

I've a requirement to read files from a folder every month. So for example if I run the program in June, it should read the file from May. Likewise if I run the program in July, it should read the file from June.

The data file (Excel worksheet) is stored as:

XYZ_050118

XYZ_040118

XYZ_030118

Can anyone suggest how I can read the latest file based on the "timestamp" on the file and choose the latest file every month?

Any help is greatly appreciated. Thank you!

SELECT MONTHLY DATA FILES

SteelersPitts — Wed, 27 Jun 2018 18:10:40 GMT

Hi All,

The data file is stored as:

XYZ_050118

XYZ_040118

XYZ_030118

Can anyone suggest how I can read the latest file based on the "timestamp" on the file and choose the latest file every month?

Any help is greatly appreciated. Thank you!

Re: Select latest dataset file every month

novinosrin — Wed, 27 Jun 2018 18:19:27 GMT

If they are SAS datasets stored in a library, You could query dictionary tables aka sashelp.vtable and filter using datecreated variable for the previous month.

Re: Select latest dataset file every month

SteelersPitts — Wed, 27 Jun 2018 18:21:41 GMT

The files are excel worksheet. Sorry, I missed that information. I've updated the post.

Re: SELECT MONTHLY DATA FILES

ChanceTGardener — Wed, 27 Jun 2018 19:43:02 GMT

data _null_;
lastmonth=put(intnx('month',"%sysfunc(today(),DATE9.)"d,-1),MMYYC5.);
mm=scan(lastmonth,1,':');
yy=scan(lastmonth,2,':');
fullname='XYZ_'||strip(mm)||'01'||strip(yy);
call symputx('filestr',fullname);
run;

%put Last months file = &filestr;

Assuming the folder you're referring to is a SAS library, use the libname and &filestr macro var to access last month's file.

Re: Select latest dataset file every month

Reeza — Thu, 28 Jun 2018 01:12:32 GMT

1. Calculate the file stamp of the file you need. This creates a macro variable that you can use in the path of your file name in the import.

%let prev_month = %sysfunc(intnx(month,%sysfunc(date()),-1),mmddyy6.);

%put &prev_month;

2. Use FEXIST() to check if the file exists first.

3. Import file as desired.

proc import out=want datafile="path to file/XYZ_&prev_month..xlsx" dbms=xlsx replace;
run;

@SteelersPitts wrote:

Hi All,

I've a requirement to read files from a folder every month. So for example if I run the program in June, it should read the file from May. Likewise if I run the program in July, it should read the file from June.

The data file (Excel worksheet) is stored as:

XYZ_050118

XYZ_040118

XYZ_030118

Can anyone suggest how I can read the latest file based on the "timestamp" on the file and choose the latest file every month?

Any help is greatly appreciated. Thank you!

Re: SELECT MONTHLY DATA FILES

SteelersPitts — Fri, 29 Jun 2018 14:31:43 GMT

Thank you for your prompt response!