I am getting "Invalid Identifier" while running the below query

Question

Iam getting the error "Invalid Identifier, c_rank" while running the below query. Please help.
select a.*, b.pog_description pog_description, b.start_date,
row_number() over(partition by b.pog_description order by b.start_date) c_rank
from temp_codi_dept_35 a, pog_master_msi b, pog_skus_msi c
where a.sku = c.pog_sku
and b.pog_id = c.pog_id
and b.pog_dept = c.pog_dept
and b.pog_number = c.pog_number
and b.pog_level = c.pog_level
and a.sku = 10263477
and c_rank = 1;

Answer 1

>
Iam getting the error "Invalid Identifier, c_rank" while running the below query. Please help.
select a.*, b.pog_description pog_description, b.start_date,
row_number() over(partition by b.pog_description order by b.start_date) c_rank
from temp_codi_dept_35 a, pog_master_msi b, pog_skus_msi c
where a.sku = c.pog_sku
and b.pog_id = c.pog_id
and b.pog_dept = c.pog_dept
and b.pog_number = c.pog_number
and b.pog_level = c.pog_level
and a.sku = 10263477
and c_rank = 1;
>
You can't use 'c_rank' in the where clause because it doesn't exist; you are computing it in the SELECT clause.
Remove the last condition and wrap your query in another one to select by 'c_rank'.