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Bel-esprit 发表于 2016-3-18 09:31 方法一: proc sort data=yourdata; by id1 pa_time;/*分别为保单号和赔案时间*/
teqel 发表于 2016-3-18 00:26 proc sql; select * from AAA group by ID having PeiAn_date = min(PeiAn_date); quit;