hi,
I sometime have to sum & count variables, and then show the difference between these two variables. Can this be done in one step instead of two?
thanks,
data have;
input name $ cli cli_letter;
datalines;
anne 1 1
barb 1 0
bob 1 1
bob 1 0
bob 1 1
mike 1 1
mike 1 1
run;
proc sql; create table have2 as
select name, count(cli) as cli,sum(cli_letter) as letter_sent
from have
group by name;quit;
data want;set have2;
/*create new var as difference between first two */
letter_not_sent=cli-letter_sent;run;
You can either just replicate the aggregate function.
proc sql;
create table have2 as
select
name
, count(cli) as cli
, sum(cli_letter) as letter_sent
, count(cli) - sum(cli_letter) as letter_not_sent
from have
group by name
;
quit;
Or use the CALCULATED keyword when referencing a variable that is derived in the current statement.
proc sql;
create table have2 as
select
name
, count(cli) as cli
, sum(cli_letter) as letter_sent
, calculated cli - calculated letter_sent as letter_not_sent
from have
group by name
;
quit;
You can either just replicate the aggregate function.
proc sql;
create table have2 as
select
name
, count(cli) as cli
, sum(cli_letter) as letter_sent
, count(cli) - sum(cli_letter) as letter_not_sent
from have
group by name
;
quit;
Or use the CALCULATED keyword when referencing a variable that is derived in the current statement.
proc sql;
create table have2 as
select
name
, count(cli) as cli
, sum(cli_letter) as letter_sent
, calculated cli - calculated letter_sent as letter_not_sent
from have
group by name
;
quit;
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