Where Statement in SAS Programming

The WHERE statement is a substitute to IF statement when it comes to subsetting a data set. Syntax:

WHERE (condition is true) => It refers to subsetting a dataset.

Task1 : Suppose you want to select only section A students. You need to filter Section variable equals to A using where clause. SQL

data readin;
input name $ Section $ Score;
cards;
Raj  A 80
Atul A 77
Priya B 45
Sandeep A 95
Rahul C 84
Shreya C 44
;
run;

data readin1;
set readin;
where Section EQ "A";
run;

where section EQ "A" => This would tell SAS to select only section which is equals to values "A". You can also write where section = "A". This statement serves the same purpose.
Output: LOGICAL OPERATORS

Symbolic	Mnemonic	Meaning
&	AND	Both conditions true
|	OR	Either condition true
~ or ^	NOT	Reverse the statement

Task2: Suppose you want to select section A and B students. You need to filter Section variable equals to A or B using where clause. SQL

data readin;
input name $ Section $ Score;
cards;
Raj  A 80
Atul A 77
Priya B 45
Sandeep A 95
Rahul C 84
Shreya C 44
;
run;

data readin1;
set readin;
where Section IN ("A" "B");
run;

where section IN ("A" "B") => This would tell SAS to select those record where section is equals to either A or B values. Output: