2016-05-02 16:57:01
老师,您好~ 请问在MySQL中是否可按列别名进行排序,如: select sno,s****,sage '年龄' from student order by '年龄';
2016-05-02 16:53:37
老师,您好~ 在分组group by中,是否可以按列别名进行分组,如: select deptid "部门号",count(*) from dept group by "部门号";