Python全系列 教程
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站在云端操控万千数据
AIGC全能工具班
A A
White Night
xxxxxxxxxx
select brand_id,item_id,count(user_id) sale_num
from to_user_log
where brand_id is not null
and item_id is not null
group by brand_id,item_id
cluster by brand_id
limit 30;
limit 30是为了暂时方便分析结果:
brand_id | item_id | sale_num |
---|---|---|
1 | 255761 | 14 |
1 | 199849 | 4 |
1 | 199557 | 7 |
1 | 196609 | 444 |
2 | 250434 | 3 |
2 | 240697 | 3 |
2 | 207315 | 17 |
2 | 203876 | 45 |
brand_id | item_id | sale_num | rank |
---|---|---|---|
1 | 196609 | 444 | 1 |
1 | 255761 | 14 | 2 |
1 | 199557 | 7 | 3 |
1 | 199849 | 4 | 4 |
2 | 203876 | 45 | 1 |
2 | 207315 | 17 | 2 |
2 | 250434 | 3 | 3 |
2 | 240697 | 3 | 4 |
优化sql语句:
xxxxxxxxxx
select brand_id,item_id,sale_num,rank
from (
select brand_id,item_id,sale_num,
row_number() over(partition by brand_id order by sale_num desc) rank
from (
select brand_id,item_id,count(user_id) sale_num
from to_user_log
where brand_id is not null
and item_id is not null
group by brand_id,item_id
cluster by brand_id
) tba
) tbb
where tbb.rank<=3;
查询结果:
创建分析结果表:
xxxxxxxxxx
create table if not exists tm_brand_item_rank(
brand_id int comment "品牌id",
item_id int comment "商品id",
sale_num int comment "销售数量",
rank int comment "品牌内销售排名",
date_day string comment "添加日期"
)
row format delimited
fields terminated by ","
lines terminated by "\n";
升级SQL:
xxxxxxxxxx
from (
select brand_id,item_id,sale_num,
row_number() over(partition by brand_id order by sale_num desc) rank
from (
select brand_id,item_id,count(user_id) sale_num
from to_user_log
where brand_id is not null
and item_id is not null
group by brand_id,item_id
cluster by brand_id
) tba
) tbb
insert into tm_brand_item_rank
select brand_id,item_id,sale_num,rank,'20300101'
where tbb.rank<=3;
执行sql,并查看tm_brand_item_rank表中的数据。