sql 查詢重複記錄並刪除

--查詢重複記錄

select original_product_name,original_product_spec
from ent_sfl_product_mapping 
where deleted = 0
group by original_product_name,original_product_spec having count(1) > 1

 

--刪除重複記錄

delete ent_sfl_product_mapping where id not in(select max(id) from ent_sfl_product_mapping group by institution_id,product_id )