Reducing Data Storage Space for Numeric Variables
way to reduce data storage space is to reduce the length of numeric
variables. In addition to conserving data storage space, reduced-length
numeric variables use less I/O, both when data is written and when
it is read. For a file that is read frequently, this savings can be
significant. However, in order to safely reduce the length of numeric
variables, you need to understand how SAS stores numeric data.
How SAS Stores Numeric Variables
To store numbers of large magnitude and to perform computations that require many digits of precision to the right of the decimal point, SAS stores all numeric values using double-precision floating-point representation. SAS numeric variables have a maximum ...