topic Re: proc sql in SAS Procedures

proc sql

manya92 — Fri, 01 Jun 2018 15:00:17 GMT

What is the difference between

proc sql ;

create table 1 as

select DISTINCT enrolid, age, sex

from have

quit ;

proc sql ;

create table 2 as

select enrolid, age, sex

from have

quit ;

proc sql ;

create table 3 as

select DISTINCT enrolid

from have

quit ;

Q1. Will i get different no. of observations for each of these datasets? If yes why ?

Q2. What is the difference between these three .

Thanks

Re: proc sql

ballardw — Fri, 01 Jun 2018 15:03:51 GMT

Run the code and see. Create data if needed, include some duplicate rows.

Re: proc sql

Reeza — Fri, 01 Jun 2018 15:06:35 GMT

You should mock up some data and test your code. Here's some mock data for you. Run it against each of the tables and see what you're results are. Note that the first table has duplicates and the second does not.

data have1;
set sashelp.class;
enrolid = _n_;
if _n_ in (1, 5, 9) then output;
output;
keep enrolid age sex;
run;

data have2;
set sashelp.class;
enrolid = _n_;
keep enrolid age sex;
run;

@manya92 wrote:

What is the difference between

proc sql ;

create table 1 as

select DISTINCT enrolid, age, sex

from have

quit ;

VS

proc sql ;

create table 2 as

select enrolid, age, sex

from have

quit ;

VS

proc sql ;

create table 3 as

select DISTINCT enrolid

from have

quit ;

Q1. Will i get different no. of observations for each of these datasets? If yes why ?

Q2. What is the difference between these three .

Thanks

Re: proc sql

manya92 — Fri, 01 Jun 2018 15:36:13 GMT

will try. thanks