跨多年的数据。答案

【问题标题】：Data across multiple years.跨多年的数据。
【发布时间】：2017-01-16 14:42:45
【问题描述】：

我需要一次显示以下多年的结果。因此，与其在 2014 年、2015 年、最后 2016 年运行这份报告，我更愿意在三年内运行一次（@startDate 和 @endDate）。不确定汇总是否有效？还是分组集？用户想要比较多年的数据。谢谢！

select ct.srv_ct_label as service, count (distinct cln.cln_urn) as total
 from cw_domain dmn
inner join cw_service srv on srv.srv_dmn_fk=dmn.dmn_pk
inner join cw_client cln on cln.cln_pk=srv.srv_cln_fk
inner join cw_subservice sbs on sbs.sbs_pk=srv.srv_sbs_fk
inner join cw_service_category ct on ct.srv_ct_rpk=sbs.sbs_srv_ct_rfk
where
srv_ct_rpk in (
'001',
'002',
'004',
'025',
'040',
'003',
'026',
'017',
'016',
'034',
'041',
'042',
'018',
'029'
)
and srv.srv_date >=@startDate and srv.srv_date <=endDate
group by ct.srv_ct_label, srv_ct_rpk, srv.srv_date
order by
case srv_ct_rpk
when '001' then 1
when'040' then 2
when '003' then 3
when '025' then 4
when '002' then 5
when '004' then 6
when '041' then 7
when '026' then 8
when '017' then 9
when '034' then 10
when '042' then 11
when '018' then 12
when '029' then 13
end

【问题讨论】：

标签： sql sql-server tsql grouping rollup

【解决方案1】：

根据需要在select、group by 和order by 中为year(srv.srv_date) as srv_year 添加一列：

select year(srv.srv_date) as srv_year, ct.srv_ct_label as service, count (distinct cln.cln_urn) as total
 from cw_domain dmn
inner join cw_service srv on srv.srv_dmn_fk=dmn.dmn_pk
inner join cw_client cln on cln.cln_pk=srv.srv_cln_fk
inner join cw_subservice sbs on sbs.sbs_pk=srv.srv_sbs_fk
inner join cw_service_category ct on ct.srv_ct_rpk=sbs.sbs_srv_ct_rfk
where
srv_ct_rpk in (
'001',
'002',
'004',
'025',
'040',
'003',
'026',
'017',
'016',
'034',
'041',
'042',
'018',
'029'
)
and srv.srv_date >=@startDate and srv.srv_date <=endDate
group by year(srv.srv_date), ct.srv_ct_label, srv_ct_rpk, srv.srv_date
order by year(srv.srv_date),
case srv_ct_rpk
when '001' then 1
when'040' then 2
when '003' then 3
when '025' then 4
when '002' then 5
when '004' then 6
when '041' then 7
when '026' then 8
when '017' then 9
when '034' then 10
when '042' then 11
when '018' then 12
when '029' then 13
end

【讨论】：

【解决方案2】：

您似乎想以水平方式比较和显示它们。因此，我推荐使用selfjoin，如下所示。

select * from
(select ... 
from tableA join tableB join ...
on ...
where srv.srv_date = 2014) as a
JOIN
(select ... 
from tableA join tableB join ...
on ...
where srv.srv_date = 2015) as b ON ...
JOIN
(select ... 
from tableA join tableB join ...
on ...
where srv.srv_date = 2016) as c ON ...

【讨论】：