I want to use "select into" to create a list of all IDs in SAS.
/* my state table try01 */
data try01;
input id state $;
cards;
1108 va
1102 dc
1101 md
1105 on
;
run;
/* select into */
proc sql noprint;
select id into: x from try01;
quit;
%put &x;
My question is why the log shows that macro x is only one value (1108) instead
of a list (1108,1102,1101,1105) ? So confused... thanks a lot.
If you want SQL to put multiple values into the macro variable then you need to include the SEPARATED BY clause.
select id into :x separated by ' ' from try01;
You could then use this list in, for example an IN operator call.
proc print data=have ;
where id in (&x);
run;
Related
I am trying to create a SAS table from Macro variable using PROC SQL:
I have a list of value saved in a macro variable :
%let l=1,2,3;
I want to create a SAS table with a column containing the values of the macro variable :
1
2
3
Thank you very much for your help.
Sincerely,
Abdeljalil
you should so some effort to solving this yourself.
Put the values into a string, parse the string and output the values you would like.
%let l=1,2,3;
data want;
str = "&l";
do i=1 to countw(str,',');
value = input(scan(str,i,","),best.);
output;
end;
/*drop other variables if you want*/
drop str i;
run;
Something like this?
%let age=%str(12,13,15);
proc sql;
select * from sashelp.class where age in (&age);
quit;
You have a data set that contains a list of names and you want to place these names into a macro variable for later use. That will work as long as the macro variable does not go beyond the 64K limit.
If the value hits this limit, then you can use macro processing to retrieve the names from the data set. Since a macro definition does not have the 64K restriction, it can be used to create the list for you.
In the sample code on the Full Code tab, we have a list of names that we want to use on an INPUT statement along with a given informat. This sample demonstrates how to create the list without having to use a macro variable.
data one;
input name $;
datalines;
abc
def
ghi
;
run;
%macro test;
%let dsid=%sysfunc(open(one));
%let cnt=%sysfunc(attrn(&dsid,nobs));
%do i=1 %to &cnt;
%let rc=%sysfunc(fetchobs(&dsid,&i));
%cmpres(%sysfunc(getvarc(&dsid,%sysfunc(varnum(&dsid,name))))) $4.
%end;
%let rc=%sysfunc(close(&dsid));
%mend test;
/** Using %PUT to see outcome **/
/** %test could be used on an INPUT statement **/
%put %test;
source: http://support.sas.com/kb/39/605.html
In this question
Simple iteration through array with proc sql in SAS
%macro doit(list);
proc sql noprint;
%let n=%sysfunc(countw(&list));
%do i=1 %to &n;
%let val = %scan(&list,&i);
create table somlib._&val as
select * from somlib.somtable
where item=&val;
%end;
quit;
%mend;
%doit(100 101 102);
I want to pass a list through macro doit which we can extract from a dataset.
For eg.: list contains the distinct values of variable 'age' present in dataset 'agegroups'.
data agegroups;
input age;
datalines;
1
2
4
5
8
18
16
19
23;
I looked upon %macro array for it but it didnt help me out(http://www2.sas.com/proceedings/sugi31/040-31.pdf)
Any help will be highly appreciated. Thanks !
As stated in the comments, BY group processing might be a better option.
However, you can use PROC SQL to create your list:
proc sql noprint;
select distinct age
into :ageList separated by ' '
from agegroups;
quit;
%put Age List: &ageList;
%doit(&ageList);
In PROC SQL, I need to select all rows where a column called "NAME" does not contain multiple values "abc", "cde" and "fbv" regardless of what comes before or after these values. So I did it like this:
SELECT * FROM A WHERE
NAME NOT CONTAINS "abc"
AND
NAME NOT CONTAINS "cde"
AND
NAME NOT CONTAINS "fbv";
which works just fine, but I imagine it would be a headache if we had a hundred of conditions. So my question is - can we accomplish this in a single statement in PROC SQL?
I tried using this:
SELECT * FROM A WHERE
NOT CONTAINS(NAME, '"abc" AND "cde" AND "fbv"');
but this doesn't work in PROC SQL, I am getting the following error:
ERROR: Function CONTAINS could not be located.
I don't want to use LIKE.
You could use regular expressions, I suppose.
data a;
input name $;
datalines;
xyabcde
xyzxyz
xycdeyz
xyzxyzxyz
fbvxyz
;;;;
run;
proc sql;
SELECT * FROM A WHERE
NAME NOT CONTAINS "abc"
AND
NAME NOT CONTAINS "cde"
AND
NAME NOT CONTAINS "fbv";
SELECT * FROM A WHERE
NOT (PRXMATCH('~ABC|CDE|FBV~i',NAME));
quit;
You can't use CONTAINS that way, though.
You can use NOT IN:
SELECT * FROM A WHERE
NAME NOT IN ('abc','cde','fbv');
If the number of items is above reasonable number to build inside code, you can create a table (work.words below) to store the words and iterate over it to check occurrences:
data work.values;
input name $;
datalines;
xyabcde
xyzxyz
xycdeyz
xyzxyzxyz
fbvxyz
;
run;
data work.words;
length word $50;
input word $;
datalines;
abc
cde
fbv
;
run;
data output;
set values;
/* build a has of words */
length word $50;
if _n_ = 1 then do;
/* this runs once only */
call missing(word);
declare hash words (dataset: 'work.words');
words.defineKey('word');
words.defineData('word');
words.defineDone();
end;
/* iterate hash of words */
declare hiter iter('words');
rc = iter.first();
found = 0;
do while (rc=0);
if index(name, trim(word)) gt 0 then do; /* check if word present using INDEX function */
found= 1;
rc = 1;
end;
else rc = iter.next();
end;
if found = 0 then output; /* output only if no word found in name */
drop word rc found;
run;
I can find all sorts of information on how to randomly select observations in SAS which is a fairly easy task. This is not what I need though. I need to randomly select variables. What I want to do specifically is randomly choose 20 variables from my list of 159 variables and do this 50 times. I want to ensure diversity too. I have been spending about two days on this and am having no luck.
I'm glad that you asked this question, because I just developed a solution for that! Let's break down exactly what needs to be done, step-by-step.
Step 0: What do we need to do?
We need a way to take all of our variables and randomly select 20 of them while keeping them within the bounds of the SAS language rules.
We'll require:
All variables in the dataset
A way to re-sort them randomly
A limit of 20 variables
A way to loop this 50 times
Let's start with 1.
Step 1: Getting all the variables
sashelp.vcolumn provides a list of all variables within a dataset. Let's select them all.
proc sql noprint;
create table all_vars as
select name
where libname = 'LIBRARYHERE' AND memname = 'HAVE'
;
quit;
This gets us a list of all variables within our dataset. Now, we need to sort them randomly.
Step 2: Making them random
SAS provides the rand function that allows you to pull from any distribution that you'd like. You can use call streaminit(seedhere) prior to the rand function to set a specific seed, creating reproducable results.
We'll simply modify our original SQL statement and order the dataset with the rand() function.
data _null_;
call streaminit(1234);
run;
proc sql noprint;
create table all_vars as
select name
from sashelp.vcolumn
where libname = 'LIBRARYHERE' AND memname = 'HAVE'
order by rand('uniform');
quit;
Now we've got all of our variables in a random order, distributed evenly by the uniform distribution.
Step 3: Limit to 20 variables
You can do this a few ways. One way is the obs= dataset option in separate procedures, another is the outobs= proc sql option. Personally, I like the obs= dataset option since it doesn't generate a warning in the log, and can be used in other procedures.
data _null_;
call streaminit(1234);
run;
proc sql noprint outobs=20;
create table all_vars as
select name
from sashelp.vcolumn
where libname = 'LIBRARYHERE' AND memname = 'HAVE'
order by rand('uniform');
quit;
Step 4: Loop it 50 times
We'll use SAS Macro Language to do this part. We can create 50 individual datasets this way, or switch the code up slightly and read them into macro variables.
%macro selectVars(loop=50, seed=1234);
data _null_;
call streaminit(&seed);
run;
%do i = 1 %to &loop;
proc sql noprint outobs=20;
create table all_vars&i as
select name
from sashelp.vcolumn
where libname = 'LIBRARYHERE' AND memname = 'HAVE'
order by rand('uniform')
;
quit;
%end;
%mend;
%selectVars;
Or, option 2:
%macro selectVars(loop=50, seed=1234);
data _null_;
call streaminit(&seed);
run;
%do i = 1 %to &loop;
proc sql noprint outobs=20;
select name
into :varlist separated by ' '
from sashelp.vcolumn
where libname = 'LIBRARYHERE' AND memname = 'HAVE'
order by rand('uniform')
;
quit;
%end;
%mend;
%selectVars;
The 2nd option will create a local macro variable called &varlist that will have the random 20 variables separated by spaces. This can be convenient for various modeling procs, and is preferable since it does not create a separate dataset each time.
Hope this helps!
You will need to treat your meta data as data and use SURVEYSELECT to select observations. Then perhaps put these names into macro variables but you did not mention the exact output you want.
data v;
array rvars[159];
run;
proc transpose data=v(obs=0) out=vars name=name;
var rvars:;
run;
proc surveyselect reps=4 sampsize=20 data=vars out=selection;
run;
proc transpose data=selection out=lists(drop=_:);
by replicate;
var name;
run;
proc print;
run;
data _null_;
set lists;
by replicate;
call symputx(cats('VLIST',_n_),catx(' ',of col:));
run;
%put _global_;
Firstly I have the following table:
data dataset;
input id $ value;
datalines;
A 1
A 2
A 3
A 4
B 2
B 3
B 4
B 5
C 2
C 4
C 6
C 8
;
run;
I would like to write a macro so that the user can subset the data by giving the id value. I do proc sql inside the macro as follows:
%macro sqlgrp(id=,);
proc sql;
create table output_&id. as
select *
from dataset
where id = '&id.'
;
quit;
%mend;
%sqlgrp(id=A); /*select id=A only*/
I am able to generate the output_A table in the WORK library, however it has zero (0) observations.
Why is this not working?
You need to use double quotes when referring to macro variables.
Current Code
%macro sqlgrp(id=,);
proc sql;
create table output_&id. as
select *
from dataset
where id = '&id.'
;
quit;
%mend;
%sqlgrp(id=A); /*select id=A only*/
Looks for values of id that are literally '&id.'. You can test this by creating this dataset:
data dataset;
input id $ value;
datalines;
&id. 2
A 2
;
run;
Now, use %let to set the value of the macro variable id:
%let id=A;
Run a quick test of the functionality difference between single and double quotes. Notice the titles also contain single and double quotes, so we can see exactly what has happened in the output:
proc sql;
title 'Single Quotes - where id=&id.';
select *
from dataset
where id='&id.';
title "Double Quotes - where id=&id.";
select *
from dataset
where id="&id.";
title;
quit;
Correct Code
%macro sqlgrp(id=,);
proc sql;
create table output_&id. as
select *
from dataset
where id = "&id."
;
quit;
%mend;
%sqlgrp(id=A); /*select id=A only*/
The double quotes allow the macro variable &id to resolve to 'A', which will return results based on your input.
Just a simple rewrite of the previous answer which passes 'in' and 'out' through a signature of the macros
%macro sqlgrp(in=, id=, out=);
proc sql noprint;
create table &out. as select * from &in. where id = "&id.";
quit;
%mend sqlgrp;