Question

现在收到以下错误：

ORA-30484: missing window specification for this function
30484. 00000 -  "missing window specification for this function"
*Cause:    All window functions should be followed by window specification,
           like <function>(<argument list>) OVER (<window specification>)
*Action:
Error at Line: 17 Column: 72

更新的代码（根据Aaron Hall建议）

select meter_id,
to_char(interval_time_local,'dd-mon-yyyy hh24:mi') as gap_start,
to_char(next_interval_time_local,'dd-mon-yyyy hh24:mi') as gap_finish
from (
                select i1.device_id as meter_id
                          ,interval_time_local
                          ,SUM(CASE i1.chan_num WHEN 0 THEN i1.chan_value * 2 ELSE 0 END) as chan0
                          ,SUM(CASE i1.chan_num WHEN 2 THEN i1.chan_value * 2 ELSE 0 END) as chan1
                          ,SUM(CASE i1.chan_num WHEN 1 THEN i1.chan_value * 2 ELSE 0 END) as chan2
                          ,SUM(CASE i1.chan_num WHEN 3 THEN i1.chan_value * 2 ELSE 0 END) as chan3
                          ,lead(interval_time_local,1) over (order by device_id, interval_time_local) as next_interval_time_local
                from gn_owner_demo.ami_read_interval i1
                where created_utc = ( select max(created_utc)
                                                                from gn_owner_demo.ami_read_interval i2
                                                                where i2.device_id = i1.device_id
                                                                and i2.interval_time_local = i1.interval_time_local)
                group by device_id, interval_time_local, i1.device_id, lead(interval_time_local,1)
                order by device_id, interval_time_local
                )
where interval_time_local <> next_interval_time_local - 30/1440;

我继承了一些提取数据空白的代码。我从未使用过OVER子句，所以不确定它是否正确使用。错误消息是：

ORA-00923: FROM keyword not found where expected
00923. 00000 -  "FROM keyword not found where expected"
*Cause:    
*Action:
Error at Line: 11 Column: 134

这是查询 - 我在SQL开发人员中运行：

select meter_id
,to_char(gn_owner_demo.interval_time_local,'dd-mon-yyyy hh24:mi') as gap_start
,to_char(gn_owner_demo.next_interval_time_local,'dd-mon-yyyy hh24:mi') as gap_finish
from (
select i1.device_id as meter_id
    ,interval_time_local
    ,SUM(CASE i1.chan_num WHEN 0 THEN i1.chan_value * 2 ELSE 0 END) as chan0
    ,SUM(CASE i1.chan_num WHEN 2 THEN i1.chan_value * 2 ELSE 0 END) as chan1
    ,SUM(CASE i1.chan_num WHEN 1 THEN i1.chan_value * 2 ELSE 0 END) as chan2
    ,SUM(CASE i1.chan_num WHEN 3 THEN i1.chan_value * 2 ELSE 0 END) as chan3
    ,lead(gn_owner_demo.interval_time_local,1) over (order by gn_owner_demo.device_id, gn_owner_demo.interval_time_local) gn_owner_demo.next_interval_time_local
from gn_owner_demo.ami_read_interval i1
where gn_owner_demo.created_utc = ( select max(gn_owner_demo.created_utc)
            from gn_owner_demo.ami_read_interval i2
            where i2.device_id = i1.device_id
            and i2.interval_time_local = i1.interval_time_local)
group by gn_owner_demo.device_id, gn_owner_demo.interval_time_local
order by gn_owner_demo.device_id, gn_owner_demo.interval_time_local
)
where gn_owner_demo.interval_time_local <> gn_owner_demo.next_interval_time_local - 30/1440;

Answer 1

什么是gn_owner_demo.interval_time_local？

您的from子句引用gn_owner_demo.ami_read_interval，因此我假设gn_owner_demo是架构名称，ami_read_interval是表的名称。如果这是正确的，那意味着gn_owner_demo.interval_time_local指的是一个单独的表，interval_time_local也归gn_owner_demo所有。如果这实际上是一个单独的表，则需要加入该表。不过，我的猜测是，您真的想引用interval_time_local表中的gn_owner_demo.interval_time_local列，这适用于您以这种方式引用的其他列，在这种情况下，您将使用{{ 1}}别名，即

il

现在，我怀疑你真的想lead( il.interval_time_local, 1 ) over( order by il.device_id, il.interval_time_local) as next_interval_time_local partition by而不是il.device_id，但是因为你没有告诉我们你的数据是什么样的，你想要的结果是什么，这只是我的猜测。

如果我的猜测是正确的，您还需要以类似的方式更改order by，WHERE和GROUP BY子句，以便引用列中的列名称你正在查询的表而不是表别名。

缺少此功能的窗口规范

1 个答案: