请参考官方的说法
[text]
The information below applies to SAS 9.2 ONLY
Understanding the Maximum Number of Observations
A SAS data set stores the number of observations it has as an integer in the C programming language signed long-data type. This means that the maximum number of observations that can be counted for a SAS data set is limited by the long integer size for the operating environment.
In operating environments with a 32-bit long integer, the maximum number is 2**31-1 or approximately two billion observations.
In operating environments with a 64-bit long integer, the number is 2**63-1 or approximately 9.2 quintillion observations.
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对于9.2来说，32位最大是20亿条，64位的就没边了

处理过1T的。

超过千万条就已经很慢了。