我觉得各有各的好处。不能一概而论。
stata没有这个功能。It's not necessary, every time, you can only work with one data, and stata holds working data in memory, so may need lot of memory with big data, SAS is better and efficient in handling very large data, especial with the use of sql. But stata is cheaper and update quickly with more modern or newest methods. Personally, I prefer to use Stata except when I have to use SAS.
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