topic How to automatically count #rows of multiple data set and store each data set count in table in SAS Programming

How to automatically count #rows of multiple data set and store each data set count in table

robert_bos — Fri, 24 Nov 2017 08:59:54 GMT

Hi,

I am new to SAS programming. I just try to find optimization code for one my exercise.

I have 3 SAS data set in my library. eg: data_1,data_2 and data_3.

what i want do that i need count each data set rows and store in table.

expected result:

Table	#Rows
Data_1	40
Data_2	30
Data_3	230

i can simply do like this:

Proc sql;

create table ds.report as

select 'Data_1' as Table, count(*) from ds.Data_1

union

select 'Data_1' as Table, count(*) from ds.Data_2

union

select 'Data_1' as Table, count(*) from ds.Data_3;

quit;

this solution basic school level and okay for small count of file. but i looking for simple code.

eg: I can easily do this in qlikview.

Report:

Load

Select tablename() as Table, count(*) from Data_*;

Looking forward your advise for this case.

Best,

Robert

Re: How to automatically count #rows of multiple data set and store each data set count in table

RM6 — Fri, 24 Nov 2017 09:13:47 GMT

Try this

proc sql;
create table xyz as
select memname,nobs from dictionary.tables where upcase(libname)='WORK' and upcase(Memname) in ('DATA_1','DATA_2','DATA_3');
quit;

Re: How to automatically count #rows of multiple data set and store each data set count in table

RW9 — Fri, 24 Nov 2017 09:25:24 GMT

Per @RM6 great answer, the answer to your question is simply that you do not need to. SAS has its own internal metadata tables, which you can find in SASHELP library. VTABLE contains information on all the tables in all the libraries that have been set, and VCOLUMN for all the columns within them, so you can simply query those tables, or in fact the dictionary syntax in SQL also relates to these:

http://www2.sas.com/proceedings/sugi30/070-30.pdf

So datastep would be:

data want;
  set sashelp.vtable (where=(libname="YOURLIB" and substr(memname,1,5)="DATA"));
run;

I would also really advise against using reserved words (data in this case) as a dataset name. It both looks odd, and doesn't provide any information, we know its data, its a dataset, what does it contain!

Re: How to automatically count #rows of multiple data set and store each data set count in table

robert_bos — Fri, 24 Nov 2017 10:22:50 GMT

Many thanks for your prompt answer.

Re: How to automatically count #rows of multiple data set and store each data set count in table

robert_bos — Fri, 24 Nov 2017 10:25:18 GMT

Aamzing.

Re: How to automatically count #rows of multiple data set and store each data set count in table

robert_bos — Fri, 24 Nov 2017 10:35:02 GMT

hahaha. I just give it for an example but real name is different. thanks for your advise.

Best,

Robert

Re: How to automatically count #rows of multiple data set and store each data set count in table

lethcons — Wed, 29 Nov 2017 11:29:48 GMT

Just be aware that using dictionary tables would not work for tables where the SAS engine does not have access to the number of rows in the table. This would be the case for database tables, and also SAS views of SAS tables. You would need to use count(*), or equivalent, in these cases.