- proc sql;
- create table one as
- select name,weight,age
- from sashelp.class
- where age<13 and length(name) GE 4
- order by age,ranuni(1)
- ;
- create table two as
- select name,weight,age
- from sashelp.class
- where age<13 and length(name) LE 4
- order by age,ranuni(2)
- ;
- quit
请问 order by 语句中 ranuni()的作用是什么?



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