了解了

是什么意思啊楼主

Exact integer
CONSTANT('EXACTINT' <, nbytes> )
Arguments
nbytes
is a numeric value that is the number of bytes.
Range 2 ≤ nbytes ≤ 8  
Default 8

The exact integer is the largest integer k such that all integers less than or equal to k in absolute value have an exact representation in a SAS numeric variable of length nbytes. This information can be useful to know before you trim a SAS numeric variable from the default 8 bytes of storage to a lower number of bytes to save storage.