没区别
用CARDS老派

CARDS的由来："Back in the day", SAS only ran on mainframes and the only way to get a SAS program into the computer was to use punch cards (also known as Hollerith cards after the inventor, see Punched card - Wikipedia, the free encyclopedia ).  Therefore, CARDS; was the natural term for getting data to the program that was inline with the program.

Doc Muhlbaier Duke
个人觉得CARDS的用法与datalines没有区别，都是借助input 在data step里直接录入数据. 在support.SAS.com里检索CARDS会直接reference到datalines

谢谢答复！
我也有相同的疑惑，终于解开了

不客气，共同学习