(2)列出emp表中各部门job为‘CLERK‘的员工的最低工资,最高工资 select max(sal) as 最高工资,min(sal) as 最低工资,deptno as 部门号 from emp where job = ‘CLERK‘ group by deptno; 18.根据下面的代码,String s = null ,会抛出NullPointerException;异常的有(A、C) A:if((s!=null)&(s.length()>0)) B:if((s!=null)&&(s.length()>0)) C:if((s==null)|(s.length()==0)) D:if((s==null)||(s.length()==0)) select p.id,p.pid,p.name,p.moduleUrl,p.operationalUrl,p.orderNo,p.createTime from tbl_permission p where id in (select permission_id from tbl_role_permission_relation where role_id in (select role_id from tbl_user_rol;e_relation where uer_id=#{useId})) order by p.orderNo select tt.* from( select * ,rownum as linenum from (业务SQL)t where rownum<=pagesize*pageNo-1)tt where linenum>(pageNo-1)*pagesize
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