I have:
proc sql;
select COL1, count(distinct COL2 ) as cnt from TBL group by COL1;
quit;
If TBL contains:
col1 col2
A
A XX
Then my output says:
col1 cnt
A 1
But the cnt should be 2. Why is it neglecting the null value?
set a value to missing value if you need it.
data TBL; input col1 $ col2 $; cards; A . A XX ; run; proc sql; select COL1, count(distinct coalescec(COL2,'......' )) as cnt from TBL group by COL1; select COL1, (count(distinct COL2)+(sum(missing(col2)) ne 0)) as cnt from TBL group by COL1; quit;
Xia Keshan
Message was edited by: xia keshan
Count function in proc sql only count nonmissing value of column.
This will include null value also
proc sql;
select col1,count(*) from have
group by col1;
quit;
Here count function count row number of dataset.
set a value to missing value if you need it.
data TBL; input col1 $ col2 $; cards; A . A XX ; run; proc sql; select COL1, count(distinct coalescec(COL2,'......' )) as cnt from TBL group by COL1; select COL1, (count(distinct COL2)+(sum(missing(col2)) ne 0)) as cnt from TBL group by COL1; quit;
Xia Keshan
Message was edited by: xia keshan
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