在sql server中如何检测一个字符串中是否包含另一个字符串 select CHARINDEX(``'456'``,``'123456'``...

bys ind: egen med = median(x)gen d = (x > med)

*substr+find;aud_name=substr(AccountingFirmName,1, find(AccountingFirmNa...

一、简单统计频数 proc freq data=XXX; table 想要统计频数的变量; run; 二、分组统计频数 proc freq da...

data noBlanks; set withBlanks; if nmiss(of _numeric_) + cmiss(of _charac...

ssc install winsor2, replace winsor2 变量名使用空格隔开 , replace cuts(1 99) by (...

proc sql; create table out as select * ,count(*) as cnt from ANNO_chen g...

一、组内 data temp1; set temp; by id; gid+1; if first.id then gid=1; ...