rownum does not work sql

-1

即时尝试获取最多行出现在表中，当我在rownum中使用时出现错误：“SQL命令没有正确结束”，还有其他事情我可以做吗？rownum does not work sql

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

来源

2015-05-21 Daniel Illouz

rownums order by子句之前进行分配。使用顶部或SELECT * FROM （选择src_customer，从由BLA倒序发送组由sending.src_customer 顺序计数（sending.src_customer）作为BLA ）其中ROWNUM = 1; – bassxzero

您的WHERE子句应该在FROM子句之后。

见Oracle documentation for more details

所以，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 
    ;

来源

2015-05-21 23:06:30

想必，你想最大的一行。在Oracle 12，你可以使用ANSI标准FETCH条款：

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，你需要一个子查询：

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;

来源

2015-05-22 00:51:48

rownum does not work sql

回答

相关问题