助力工业物联网，工业大数据之油站事实指标需求分析【十九】

oil_current a  left join oil_history b on  a.id = b.id
where b.id is null

select
   id os_id					--油站id
   , name os_name				--油站名称
   , code os_code				--油站编码
   , province province_id		--油站省份
   , city city_id				--油站城市
   , region county_id			--油站区域
   , status status_id			--油站状态
   , customer_classify cstm_type_id		--客户分类id
   , 1 os_num							--油站数量：默认为1
   , case when status = 2 then 1 else 0 end invalid_os_num		--停用油站数量：1-停用，0-启用
   , case when status = 1 then 1 else 0 end valid_os_num		--有效油站数量：1-有效，0-无效
from ciss_base_oilstation;

create table if not exists one_make_dwd.ciss_base_oilstation_history
stored as orc
as select * from one_make_dwd.ciss_base_oilstation
where dt < '20210102';

--获取当前的油站是否是一个新增油站
select
    oil.id
    , case when oil.id = his.id then 0 else 1 end current_new_os_num
--今日油站数据表
from one_make_dwd.ciss_base_oilstation oil
--历史油站数据表
left outer join one_make_dwd.ciss_base_oilstation_history his
on oil.id = his.id where oil.dt = '20210101';

-- 设备信息表中按照油站id分组聚合设备id：每个油站的设备个数
select
    oil.id, count(dev.id) device_num 
from one_make_dwd.ciss_base_oilstation oil
left join one_make_dwd.ciss_base_device_detail dev on oil.id = dev.oilstation_id
where oil.dt = '20210101'
group by oil.id;

-- 创建油站事实表
drop table if exists one_make_dwb.fact_oil_station;
create table if not exists one_make_dwb.fact_oil_station(
    os_id string comment '油站id'
    , os_name string comment '油站名称'
    , os_code string comment '油站编码'
    , province_id string comment '省份id'
    , city_id string comment '城市id'
    , county_id string comment '县id'
    , status_id int comment '状态id'
    , cstm_type_id int comment '客户分类id'
    , os_num int comment '油站数量 默认为1'
    , invalid_os_num int comment '已停用油站数量（状态为已停用为1，否则为0）'
    , valid_os_num int comment '有效油站数量（状态为启用为1，否则为0）'
    , current_new_os_num int comment '当日新增油站（新增油站为1，老油站为0）'
    , current_invalid_os_num int comment '当日停用油站（当天停用的油站数量）'
    , device_num int comment '油站设备数量' 
)
comment "油站事实表"
partitioned by (dt string)
stored as orc
location '/data/dw/dwb/one_make/fact_oil_station';

insert overwrite table one_make_dwb.fact_oil_station partition(dt = '20210101')
select
   oil.id os_id					--油站id
   , name os_name				--油站名称
   , code os_code				--油站编码
   , province province_id		--油站省份
   , city city_id				--油站城市
   , region county_id			--油站区域
   , status status_id			--油站状态
   , customer_classify cstm_type_id		--客户分类id
   , 1 os_num							--油站数量：默认为1
   , case when status = 2 then 1 else 0 end invalid_os_num		--停用油站数量：1-停用，0-启用
   , case when status = 1 then 1 else 0 end valid_os_num		--有效油站数量：1-有效，0-无效
   , current_new_os_num					--当日新增油站数量，1-新增，0-老油站
   , case when current_invalid_os_num is null then 0 else current_invalid_os_num end current_invalid_os_num --当日停用油站数量
   , device_num							--油站设备数量
   --油站信息表
from one_make_dwd.ciss_base_oilstation oil
     left join (
	     --关联历史油站表，判断是否为新增油站
         select 
		     oil.id
			 , case when oil.id = his.id then 0 else 1 end current_new_os_num 
		 from one_make_dwd.ciss_base_oilstation oil
         left outer join one_make_dwd.ciss_base_oilstation_history his 
		 on oil.id = his.id where oil.dt = '20210101'
     ) oilnewhis on oil.id = oilnewhis.id
     left join (  
         --关联停用油站数据，统计今日停用油站个数 
         select 
		     oil.id, count(oil.id) current_invalid_os_num 
		 from one_make_dwd.ciss_base_oilstation oil 
		 where oil.dt = '20210101' and oil.status = 2 group by oil.id
     ) invalidos on oil.id = invalidos.id
     left join (
		 --关联油站设备信息表，统计油站设备个数
         select 
		     oil.id, count(dev.id) device_num from one_make_dwd.ciss_base_oilstation oil
         left join one_make_dwd.ciss_base_device_detail dev on oil.id = dev.oilstation_id
         where oil.dt = '20210101'
         group by oil.id
     ) devinfo on oil.id = devinfo.id;