Sql 添加总计行并转换为百分比

我有一个数据库，里面有人们的工作条件和邻居的信息

我必须以百分比显示信息图表，如下所示：

Neighbourhood Total  Employed Unemployed Inactive
Total          100     50         25        25
1              100     45         30        25
2              100     55         20        25

为此，到目前为止我编写的代码是：

   select neighbourhood, Count (*) as Total,
   Count(Case when (condition = 1) then 'employed' end) as employed,
   Count (case when (condition = 2) then 'unemployed' end) as unemployed,
   Count (Case when (condition =3) then 'Inactive' end) as Inactive

   from table
   group by  neighbourhood
   order by  neighbourhood

该代码的输出为（绝对值是由数字组成的，它们不会产生上述百分比）：

因此，我必须将绝对数转换为百分比，并将总行相加（将邻里的值相加），但我所有的努力都失败了。我无法解决如何添加总行数，也无法解决如何计算每个街区的总行数以计算百分比

我两周前才开始学习SQL，因此，对于给您带来的不便，我深表歉意。我尽我最大的努力保持它的简单（在我的数据库中有15个街区，如果它们用数字标记就可以了）

---

谢谢

您需要将UNION添加到总行中

   select 'All' as neighbourhood, Count (*) as Total,
   Count(Case when (condition = 1) then 1 end) as employed,
   Count (case when (condition = 2) then 1 end) as unemployed,
   Count (Case when (condition =3) then 1 end) as Inactive

   from table

   UNION all

   select neighbourhood, Count (*) as Total,
   Count(Case when (condition = 1) then 1 end) as employed,
   Count (case when (condition = 2) then 1 end) as unemployed,
   Count (Case when (condition =3) then 1 end) as Inactive

   from table
   group by  neighbourhood
   order by  neighbourhood

---

您可以使用分组集添加总行数：

select neighbourhood, Count(*) as Total,
       sum((condition = 1)::int) as employed,
       sum((condition = 2)::int) as unemployed,
       sum((condition = 3)::int) as Inactive
from table
group by grouping sets ( (neighbourhood), () )
order by  neighbourhood;

---

如果要在每行中求平均值，请使用

avg（）

而不是

sum（）

我收到一条错误消息：sintax对整数“all”无效当我运行union上的代码时，邻域列显示为“未知”。对于并集下面的代码，neighbourth是整数（也就是说，hoods是用数字命名的），不能在同一列上有整数和字符串，因此需要将neighbouroud转换为字符串

select neighbourhood, Count(*) as Total,
       sum((condition = 1)::int) as employed,
       sum((condition = 2)::int) as unemployed,
       sum((condition = 3)::int) as Inactive
from table
group by grouping sets ( (neighbourhood), () )
order by  neighbourhood;