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PetePatel
Quartz | Level 8

Hi,

 

I have a large dataset (3m records) with around 10,000 columns (variables).

 

I need to find the number of distinct values in each column as shown below:

 

From this:

IDNameNum
123last name10000
123last name20000
345s drop30000
456s drop40000
123s drop40000

 

To this:

ID3
Name2
Num4

 

What is the most efficient way of generating these results for c. 10,000 columns?

 

Cheers

1 ACCEPTED SOLUTION

Accepted Solutions
Ksharp
Super User
ods select none;
ods output nlevels=want;
proc freq data=sashelp.class nlevels ;
table _all_/missing;
run;
ods select all;

View solution in original post

5 REPLIES 5
Sathish_jammy
Lapis Lazuli | Level 10

 

Try the below code to get the distinct value for the variables...

 

Proc sql;
select count(ID)as ID, count(Name)as Name, count(Num) as Num from dataset_name;
Quit;
PetePatel
Quartz | Level 8

Thanks, is there a quicker way than having a really long script with 10,000 vars?

Ksharp
Super User
ods select none;
ods output nlevels=want;
proc freq data=sashelp.class nlevels ;
table _all_/missing;
run;
ods select all;

jeffharris
Calcite | Level 5

Why does this work?

Ksharp
Super User
Did you run the code and check WANT table ?


Var NLevels
Name 19
Sex 2
Age 6
Height 17
Weight 15

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