Check For Null Values In Sas Apr 2026

If you want to audit an entire dataset rather than filtering row-by-row, use PROC FREQ or PROC MEANS. Missing Values in SAS - ListenData

if missing(variable_name) then do; /* Action for missing value */ end; Use code with caution. Copied to clipboard

Use a blank space enclosed in quotes. if name = ' ' then flag = "Missing"; Use code with caution. Copied to clipboard 2. Checking Multiple Variables at Once Check For Null Values In Sas

Note: To capture special missing values (like .A through .Z or ._ ), use if variable_name <= .z .

Use a period to check for standard missing values. if age = . then flag = "Missing"; Use code with caution. Copied to clipboard If you want to audit an entire dataset

If you need to count how many fields are missing across a row, use these specialized functions:

The most versatile way to check for a missing value in a DATA step is the MISSING() function, which works for both numeric and character data. if name = ' ' then flag = "Missing"; Use code with caution

Returns the count of missing numeric arguments. miss_count = nmiss(var1, var2, var3); Use code with caution. Copied to clipboard