最后一行中的总计查询

Question

此查询将返回一份工程师名称列表，其中包含测试结果的工程师姓名列表，其中列出了他们在过去一小时内测试的内容，错误内容，工作内容以及每位工程师的总计。

我希望能够在底部添加一行，这些数额将总计这些数额，但我挣扎，任何人有任何建议吗？

select distinct qcheck.checkby, 
       ifnull(fully,0) as fully, 
       ifnull(faulty,0) as faulty, 
       ifnull(lasthour,0) as lasthour, 
       ifnull(total,0) as total 
from   qcheck 
left join  (
       select count(*) AS fully, 
         checkby, 
         qcheck.id 
       from  qcheck 
       where result = 'fully tested & working' 
       and  date(finishdate) = CURDATE() 
       group by checkby) AS fw 
      on fw.checkby=qcheck.checkby 
left join (
       select count(*) AS faulty, 
         checkby, 
         qcheck.id 
       from  qcheck 
       where result = 'faulty' 
       and  date(finishdate) = CURDATE() 
       group by checkby) AS ff 
      on ff.checkby=qcheck.checkby 
left join (
       select count(*) AS Lasthour, 
         checkby, 
         qcheck.id from qcheck 
       where finishdate >= now() - interval 1 hour 
       group by checkby) AS lh 
      on lh.checkby=qcheck.checkby 
left join (
       select count(*) AS total, 
         checkby, 
         qcheck.id from qcheck 
       where date(finishdate) = CURDATE() 
       group by checkby) AS total 
      on total.checkby=qcheck.checkby 
where   date(finishdate) = CURDATE() 
and    qcheck.checkby not like 'michael' 
and    qcheck.checkby not like 'chaz' 
group by  qcheck.checkby 
order by  total desc 

Answer 1

首先，你不需要子查询，你可以对一个条件进行计数。

可以将with rollup修饰符添加到group by子句中以包含总计。 order by不能在同一个查询中使用，但可以应用在外部查询中。

此外，通过使用​​3210，您可以用您选择的标签替换该总行的null值。

最后，仍然在最后的总排序行，你可以在order by条款，这将计算为false或true中添加is null表达。后者是最后命令。

select coalesce(checkby, 'Total') as checkby_or_total, 
     fully, 
     faulty, 
     lasthour, 
     total 
from (
     select qcheck.checkby, 
       count(case result when 'fully tested & working' then 1 end)  as fully, 
       count(case result when 'faulty' then 1 end)      as faulty, 
       count(case when finishdate >= now()-interval 1 hour then 1 end) as lasthour, 
       count(*) as total 
     from  qcheck 
     where date(finishdate) = CURDATE() 
     and  qcheck.checkby not like 'michael' 
     and  qcheck.checkby not like 'chaz' 
     group by qcheck.checkby with rollup 
     ) as main 
order by checkby is null, 
      total desc