首页->阿里云大数据助理工程师认证(ACA)

多选题 :  以下Maxcompute SQL中语法错误的是:()。

（A）select col2 from tbl group by substr(col2,2);

（B）select cols as c from tbl order by col2 limit 100

（C）select substr (col2,2) from tbl group by substr(col2,2);

（D）select col2 as c from tbl order by c limit 100