Question

我正在尝试运行这样的UNION查询：

#standardSQL
SELECT
    s.campaign_name, 
    date(event_date) as event_date,
    'email' medium,
    count(s.send_id) sends
    from pixel_logs.table1 s
    inner join pixel_logs.full_logs AS l on l.uid = s.uid
    where 1=1
    group by
    event_date,
    campaign_name
    order by
    event_date

UNION ALL

    select
    s.campaign_name,
    date(event_date) as event_date,
    'sms' medium,
    count(s.send_id)
    from pixel_logs.table2 s
    inner join pixel_logs.full_logs AS l on l.uid = s.uid
    where 1=1
    and account_id = 'xxxx'
    group by
    event_date,
    campaign_name
    order by
    event_date;

但是我收到了这条消息：

Syntax error: Unexpected keyword UNION at [21:1] Dismiss

如何解决这个问题？

Answer 1

在UNION个查询ORDER BY通常在最后应用一次，而不是查询的每个部分。您可以尝试从查询的前半部分删除ORDER BY：

#standardSQL
select
    s.campaign_name, 
    date(event_date) as event_date,
    'email' medium,
    count(s.send_id) sends
from pixel_logs.table1 s
inner join pixel_logs.full_logs AS l on l.uid = s.uid
    where 1=1
group by
    event_date,
    campaign_name

UNION ALL

select
    s.campaign_name,
    date(event_date)
    'sms' medium,
    count(s.send_id)
from pixel_logs.table2 s
inner join pixel_logs.full_logs AS l on l.uid = s.uid
    where 1=1
    and account_id = 'xxxx'
group by
    event_date,
    campaign_name
order by
    event_date;

此外，在UNION查询的后半部分中不应该需要任何别名，因为前半部分中指定的别名是将要使用的别名。

bigquery

1 个答案: