枞表转横表
select
product_id
,max(case when field='test1' then 1 else 0 end) as test1
,max(case when field='test2' then 1 else 0 end) as test2
,max(case when field='test2' then 1 else 0 end) as test2
from
test_table_name
group by id
横表转枞表
主要是explode、split、concat_ws等方法组合使用
时间会记录下一切。