sas 中 || 是什么意思

Question

例如
proc sql;
create table lc.a as
select * from lc.b where database||subname||ShopAdd in
select distinct database||subname||ShopAdd from lc.b where subname^='无'
group by database||subname||ShopAdd
having count(database)>1;
quit;

Answer 1

sas 中 || 就是连接符,保留首尾全部空格