Скачать или смотреть A Genuine Use Case of DENSE RANK over RANK | RANK vs Dense RANK | Data Analytics

In this video we will cover a real use case where we need to use dense rank over rank.

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script:
create table product_inventory_fact
(
product_id varchar(10),
quantity integer,
snapshot_date date
)
insert into product_inventory_fact
values ('ITEM1',10,'2022-08-01'),('ITEM2',14,'2022-08-01')
,('ITEM1',10,'2022-08-02'),('ITEM2',12,'2022-08-02')
,('ITEM1',5,'2022-08-03'),('ITEM2',6,'2022-08-03'),('ITEM3',6,'2022-08-03')
,('ITEM1',10,'2022-08-04'),('ITEM2',9,'2022-08-04'),('ITEM3',3,'2022-08-04'),('ITEM4',8,'2022-08-04')

#sql #dataengineer