Question

即时尝试获取最多行显示在表中，当我在rownum中使用时我得到错误：“SQL命令未正确结束”，还有其他我可以做的事情？

 select src_customer ,count(sending.src_customer) as bla
    from sending
    group by sending.src_customer
    order by bla desc
    where rownum=1;

Answer 1

据推测，你想要最大的一行。在Oracle 12中，您可以使用ANSI标准FETCH子句：

select src_customer, count(s.src_customer) as bla
from sending s
group by s.src_customer
order by bla desc
fetch first 1 row only;

在早期版本中，您需要一个子查询：

select *
from (select src_customer, count(s.src_customer) as bla
      from sending s
      group by s.src_customer
      order by bla desc
     ) s
where rownum = 1;

Answer 2

您的WHERE子句应该在FROM子句之后。

请参阅Oracle documentation for more details

因此，您的查询应该像

select src_customer ,count(sending.src_customer) as bla
    from sending
    where rownum=1
    group by sending.src_customer
    order by bla desc
    ;

rownum不工作sql

2 个答案: