I am trying to update the one field in the final table. i have logic down here. I have to update the last_version_flag when it meets certain scenario. how to use WITH CTE concept in snowflake. thank you in advance.
update dw.tb_fidctp_order
set last_version_flag = 'N'
from dw.tb_fidctp_order
where (with my_cte as (
select order_id, MAX(cast(VERSION as NUMBER(18,0))) as max_version
from stg.tb_fidctp_order_input
group by order_id))
DW.tb_fidctp_order.order_id = my_cte.order_id and DW.tb_fidctp_order.version < my_cte.max_version
The correct syntax is UPDATE target_table SET col_name = value FROM additional_tables WHERE condition :
CREATE TABLE tb_fidctp_order(version INT, order_id INT, last_version_flag TEXT);
CREATE TABLE tb_fidctp_order_input(version INT,order_id INT, last_version_flag TEXT);
update tb_fidctp_order
set last_version_flag = 'N'
from (
WITH cte AS (
select order_id, MAX(cast(VERSION as NUMBER(18,0))) as max_version
from tb_fidctp_order_input
group by order_id
)
SELECT * FROM cte
) AS my_cte
where tb_fidctp_order.order_id = my_cte.order_id
and tb_fidctp_order.version < my_cte.max_version;
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