如何在新列中显示总计数结果

Question

我正在尝试从一个表和总状态计算中计算状态，但它在查询所在的同一列中显示

select Status ,count(Status) from assigntask group by status union all
SELECT count(Status) , count(Status) as total from assigntask ;

并且Reslut显示像这样

Status    Count
Complete    1
Delay       2
  3         3

是否有可能在另一列中不显示计数“3”？

例如

Status   Count   Total
Complete   1       3
Delay      2

Answer 1

试试这个：

select Status ,count(Status), null as totalCount from assigntask group by status union all
SELECT 'Total status' , null,  count(Status) from assigntask ;

这不完全是你想要的结果，但我认为这个结果比你理性展示的结果要好。

它将生成此结果：

Status         Count     Total
Complete       1         null
Delay          2         null  
Total status   null      3

Answer 2

试试这个：

@sortedInternalLinksHash = @countHash.sort_by { |_,v| - v }

Answer 3

你必须在两个选择中提供一个虚拟字段，以便工会匹配。

SELECT Status, COUNT(Status) as count, NULL as total FROM assigntask GROUP BY status 
UNION ALL
SELECT NULL, COUNT(Status), COUNT(Status) FROM assigntask;

Answer 4

 

select Status, count(*) as status_total, q.total as all_total
from assigntask t
full join (select count(*) as total from assigntask) q
group by Status;

旁注：
在sql-server上你可以使用sum窗口函数 但它不是在MySQL上。

select Status, count(*) as status_total, sum(count(*)) over () as all_total
from assigntask
group by Status;

Answer 5

如果您确实希望在第一行中拥有总值，则可以使用此查询：

select t1.* from (
    select Status, count(Status) as count, (select count(Status) from assigntask) as total
    from assigntask 
    group by Status limit 1) as t1
union all
select t2.* from (
    select Status, count(Status) as count, null as total
    from assigntask 
    group by Status limit 1,100000) as t2

结果是

另一种方法是这样的：

select Status, count(Status) as count, (select count(Status) from assigntask) as total
from assigntask 
group by Status

给出以下结果

我个人会使用两个单独的简单查询：

select Status, count(Status) as count
from assigntask 
group by Status;

select count(Status) as total from assigntask;