[英]SQL How to count case
I am trying to case out a select statement. 我试图说明一个选择声明。 However, there are multiple results for 7am 8am 9am etc. I'd like the results to show:
但是,早上7点8点9点等有多个结果。我希望结果显示:
Count Time 数时间
10 7am 上午10点半
6 8am 早上6点8分
etc. Instead, it is showing all the 7ams all the 8ams etc. 相反,它显示所有8ams所有8ams等。
select
case
when aq.datestarted between to_date( '22-MAY-2014 07:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 " 07:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '7am'
when aq.datestarted between to_date( '22-MAY-2014 08:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 " 08:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '8am'
when aq.datestarted between to_date( '22-MAY-2014 09:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 " 09:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '9am'
when aq.datestarted between to_date( '22-MAY-2014 10:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 " 10:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '10am'
when aq.datestarted between to_date( '22-MAY-2014 11:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 " 11:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '11am'
END as Time
from archivedqueue aq
where aq.datestarted between to_date( '22-MAY-2014 07:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 " 11:59:59', 'dd-mon-yyyy hh24:mi:ss' )
select COUNT(*), Time
FROM
(SELECT
case
when aq.datestarted between to_date( '22-MAY-2014 07:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 " 07:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '7am'
when aq.datestarted between to_date( '22-MAY-2014 08:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 " 08:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '8am'
when aq.datestarted between to_date( '22-MAY-2014 09:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 " 09:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '9am'
when aq.datestarted between to_date( '22-MAY-2014 10:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 " 10:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '10am'
when aq.datestarted between to_date( '22-MAY-2014 11:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 " 11:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '11am'
END as Time
from archivedqueue aq
where aq.datestarted between to_date( '22-MAY-2014 07:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 " 11:59:59', 'dd-mon-yyyy hh24:mi:ss' )) tempTable
GROUP BY Time
Group by Time
will combine all the 7ams,8ams, together. Group by Time
将所有7个ams8ms组合在一起。 Count(*)
counts the number of rows in each group. Count(*)
计算每个组中的行数。
SELECT COUNT(*) AS Count, Time
FROM (SELECT case
when aq.datestarted between to_date( '22-MAY-2014 07:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 07:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '7am'
when aq.datestarted between to_date( '22-MAY-2014 08:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 08:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '8am'
when aq.datestarted between to_date( '22-MAY-2014 09:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 09:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '9am'
when aq.datestarted between to_date( '22-MAY-2014 10:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 10:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '10am'
when aq.datestarted between to_date( '22-MAY-2014 11:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 11:59:59', 'dd-mon-yyyy hh24:mi:ss' ) then '11am'
END as Time
FROM archivedqueue aq
WHERE aq.datestarted between to_date( '22-MAY-2014 07:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 11:59:59', 'dd-mon-yyyy hh24:mi:ss' )
) name_required
GROUP BY Time
ORDER BY Time;
The sub-query is what you wrote (apart from a fixup in the second TO_DATE in the various BETWEEN conditions — it is easier to spot problems when you can see the code without horizontal scrolling!), marginally reformatted. 子查询是您编写的(除了在各种BETWEEN条件下的第二个TO_DATE中的修复 - 当您可以看到没有水平滚动的代码时更容易发现问题!),稍微重新格式化。 Note that the ORDER BY is imperfect because the sort is text-based (so the
10am
and 11am
entries will appear before the 7am
to 9am
entries). 请注意,ORDER BY不完美,因为排序是基于文本的(所以
10am
和11am
条目将出现在7am
到9am
之前)。 If you don't like that, use a text-sortable format such as 07
or 0700
or 0700-07:59
instead of the 'am'-tagged times. 如果您不喜欢这样,请使用文本可排序的格式,例如
07
或0700
或0700-07:59
而不是'am'标记的时间。
This is not extensible. 这不可扩展。 You need to work harder on what's in the CASE statement.
您需要更加努力地处理CASE语句中的内容。
Maybe: 也许:
TO_CHAR(aq.datestarted, 'yyyy-mm-dd hh24:00') AS time
The restriction condition in the WHERE clause then provides the correct limits on the search. 然后,WHERE子句中的限制条件为搜索提供了正确的限制。
SELECT COUNT(*) AS Count, TO_CHAR(aq.datestarted, 'yyyy-mm-dd hh:00') AS time
FROM archivedqueue aq
WHERE aq.datestarted BETWEEN to_date('22-MAY-2014 07:00:00', 'dd-mon-yyyy hh24:mi:ss')
AND to_date('22-MAY-2014 11:59:59', 'dd-mon-yyyy hh24:mi:ss')
GROUP BY Time
ORDER BY Time;
To get it working how you'd expect, use what's below... However, there's probably a better way than hardcoding dates and times. 为了让它按照您的预期运行,请使用以下内容...但是,可能有一种比硬编码日期和时间更好的方法。
SELECT COUNT(*) AS 'Count',
CASE
WHEN aq.datestarted BETWEEN to_date( '22-MAY-2014 07:00:00', 'dd-mon-yyyy hh24:mi:ss' ) AND to_date( '22-MAY-2014 " 07:59:59', 'dd-mon-yyyy hh24:mi:ss' ) THEN '7am'
WHEN aq.datestarted BETWEEN to_date( '22-MAY-2014 08:00:00', 'dd-mon-yyyy hh24:mi:ss' ) AND to_date( '22-MAY-2014 " 08:59:59', 'dd-mon-yyyy hh24:mi:ss' ) THEN '8am'
WHEN aq.datestarted BETWEEN to_date( '22-MAY-2014 09:00:00', 'dd-mon-yyyy hh24:mi:ss' ) AND to_date( '22-MAY-2014 " 09:59:59', 'dd-mon-yyyy hh24:mi:ss' ) THEN '9am'
WHEN aq.datestarted BETWEEN to_date( '22-MAY-2014 10:00:00', 'dd-mon-yyyy hh24:mi:ss' ) AND to_date( '22-MAY-2014 " 10:59:59', 'dd-mon-yyyy hh24:mi:ss' ) THEN '10am'
WHEN aq.datestarted BETWEEN to_date( '22-MAY-2014 11:00:00', 'dd-mon-yyyy hh24:mi:ss' ) AND to_date( '22-MAY-2014 " 11:59:59', 'dd-mon-yyyy hh24:mi:ss' ) THEN '11am'
END AS 'Time'
FROM archivedqueue aq
WHERE aq.datestarted BETWEEN to_date( '22-MAY-2014 07:00:00', 'dd-mon-yyyy hh24:mi:ss'
GROUP BY CASE
WHEN aq.datestarted BETWEEN to_date( '22-MAY-2014 07:00:00', 'dd-mon-yyyy hh24:mi:ss' ) AND to_date( '22-MAY-2014 " 07:59:59', 'dd-mon-yyyy hh24:mi:ss' ) THEN '7am'
WHEN aq.datestarted BETWEEN to_date( '22-MAY-2014 08:00:00', 'dd-mon-yyyy hh24:mi:ss' ) AND to_date( '22-MAY-2014 " 08:59:59', 'dd-mon-yyyy hh24:mi:ss' ) THEN '8am'
WHEN aq.datestarted BETWEEN to_date( '22-MAY-2014 09:00:00', 'dd-mon-yyyy hh24:mi:ss' ) AND to_date( '22-MAY-2014 " 09:59:59', 'dd-mon-yyyy hh24:mi:ss' ) THEN '9am'
WHEN aq.datestarted BETWEEN to_date( '22-MAY-2014 10:00:00', 'dd-mon-yyyy hh24:mi:ss' ) AND to_date( '22-MAY-2014 " 10:59:59', 'dd-mon-yyyy hh24:mi:ss' ) THEN '10am'
WHEN aq.datestarted BETWEEN to_date( '22-MAY-2014 11:00:00', 'dd-mon-yyyy hh24:mi:ss' ) AND to_date( '22-MAY-2014 " 11:59:59', 'dd-mon-yyyy hh24:mi:ss' ) THEN '11am'
END
You just want this: 你只想要这个:
select count(*) count, hour(datestarted) time
from rchivedqueue
where datestarted between to_date( '22-MAY-2014 07:00:00', 'dd-mon-yyyy hh24:mi:ss' ) and to_date( '22-MAY-2014 " 11:59:59', 'dd-mon-yyyy hh24:mi:ss' )
group by hour(datestarted)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.