在postgres中创建一个支点

Question

我正在使用postgres RDBMS，并希望对此进行调整。

如何在postgres中调整结果？

当我执行以下查询时，我得到了这个结果

在发布之前我试过这个！

select * from 
(
select count(tnx_id) as x,
case act_dt between 20140301 and 20140831 then '0-6 m'
when act_dt between 20130901 and 20140231 then '7-12 m'
when act_dt between 20130301 and 20130831 then '13-18 m'
else '18+'
end as act_bucket,

case when tnx_dt_int between 20140301 and 20140831 then '0-6 m'
when  tnx_dt_int between 20130901 and 20140231 then '7-12 m'
when tnx_dt_int between 20130301 and 20130831 then '13-18 m'
else '18+'
end as tnx_bucket



 from card 
inner join tnx on card_id=tnx_cardh_id
group by act_bucket,tnx_bucket)
x1
pivot(x)
(
for tnx_bucket in([0-6 m],[7-12 m],[13-18 m],[18+])
)



so that i get like this 

              act_bucket
tnx_bucket  0-6 m 7-12 m 13-18 m 18+
0-6m         <  here filled with Count(tnx_id)      >
7-12 m
13-18 m
18+

Answer 1

您正在寻找qazxsw poi的qazxsw poi功能

这是它的一个例子（来自doc）：

crosstab

祝好运！