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名师互学网 > IT > 前沿技术 > 大数据 > 大数据系统

hive与presto行转列sql写法

hive与presto行转列sql写法

---------------------------------------------------------------------------------------------------------------hive
--------------------customerid
select s_customer_profile_day.customerid
  from (select customerid, devset.deviceid
          from deviceprofile.s_customer_profile_day 
       LATERAL VIEW explode(devids) devset AS deviceid) s_customer_profile_day
  left join 
       (select deviceid 
       	  from deviceprofile.s_ups_deviceprofile_day) s_ups_deviceprofile_day
    on s_customer_profile_day.deviceid = s_ups_deviceprofile_day.deviceid
---------------------------------------------------------------------------------------------------------------presto
--------------------customerid
select s_customer_profile_day.customerid
  from (select customerid, devset.deviceid
          from deviceprofile.s_customer_profile_day 
       cross join unnest(devids) as devset(deviceid)) s_customer_profile_day
  left join 
       (select deviceid 
       	  from deviceprofile.s_ups_deviceprofile_day) s_ups_deviceprofile_day
    on s_customer_profile_day.deviceid = s_ups_deviceprofile_day.deviceid

hive 行转列使用LATERAL VIEW explode(devids)  devset AS deviceid

presto行转列使用cross join unnest(devids) as devset(deviceid)

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