Column-Level SQL Lineage Demo

insert into query49
	select 'web' as channel
		 , web.item
		 , web.return_ratio
		 , web.return_rank
		 , web.currency_rank
	from (
			 select item
				  , return_ratio
				  , currency_ratio
				  , rank() over (order by return_ratio)   as return_rank
				  , rank() over (order by currency_ratio) as currency_rank
			 from (select ws.ws_item_sk                                              as item
						, (cast(sum(coalesce(wr.wr_return_quantity, 0)) as decimal(15, 4)) /
						   cast(sum(coalesce(ws.ws_quantity, 0)) as decimal(15, 4))) as return_ratio
						, (cast(sum(coalesce(wr.wr_return_amt, 0)) as decimal(15, 4)) /
						   cast(sum(coalesce(ws.ws_net_paid, 0)) as decimal(15, 4))) as currency_ratio
				   from web_sales ws
							left outer join web_returns wr
											on (ws.ws_order_number = wr.wr_order_number and
												ws.ws_item_sk = wr.wr_item_sk)
					  
				   where wr.wr_return_amt > 10000
					 and ws.ws_net_profit > 1
					 and ws.ws_net_paid > 0
					 and ws.ws_quantity > 0
					 and ws_sold_date_sk = d_date_sk
					 and d_year = 2001
					 and d_moy = 12
				   group by ws.ws_item_sk
				  ) in_web
		 ) web
	where (
				  web.return_rank <= 10
				  or
				  web.currency_rank <= 10
			  )
	union
	select 'catalog' as channel
		 , catalog.item
		 , catalog.return_ratio
		 , catalog.return_rank
		 , catalog.currency_rank
	from (
			 select item
				  , return_ratio
				  , currency_ratio
				  , rank() over (order by return_ratio)   as return_rank
				  , rank() over (order by currency_ratio) as currency_rank
			 from (select cs.cs_item_sk                                              as item
						, (cast(sum(coalesce(cr.cr_return_quantity, 0)) as decimal(15, 4)) /
						   cast(sum(coalesce(cs.cs_quantity, 0)) as decimal(15, 4))) as return_ratio
						, (cast(sum(coalesce(cr.cr_return_amount, 0)) as decimal(15, 4)) /
						   cast(sum(coalesce(cs.cs_net_paid, 0)) as decimal(15, 4))) as currency_ratio
				   from catalog_sales cs
							left outer join catalog_returns cr
											on (cs.cs_order_number = cr.cr_order_number and
												cs.cs_item_sk = cr.cr_item_sk)
					  
				   where cr.cr_return_amount > 10000
					 and cs.cs_net_profit > 1
					 and cs.cs_net_paid > 0
					 and cs.cs_quantity > 0
					 and cs_sold_date_sk = d_date_sk
					 and d_year = 2001
					 and d_moy = 12
				   group by cs.cs_item_sk
				  ) in_cat
		 ) catalog
	where (
				  catalog.return_rank <= 10
				  or
				  catalog.currency_rank <= 10
			  )
	union
	select 'store' as channel
		 , store.item
		 , store.return_ratio
		 , store.return_rank
		 , store.currency_rank
	from (
			 select item
				  , return_ratio
				  , currency_ratio
				  , rank() over (order by return_ratio)   as return_rank
				  , rank() over (order by currency_ratio) as currency_rank
			 from (select sts.ss_item_sk                                              as item
						, (cast(sum(coalesce(sr.sr_return_quantity, 0)) as decimal(15, 4)) /
						   cast(sum(coalesce(sts.ss_quantity, 0)) as decimal(15, 4))) as return_ratio
						, (cast(sum(coalesce(sr.sr_return_amt, 0)) as decimal(15, 4)) /
						   cast(sum(coalesce(sts.ss_net_paid, 0)) as decimal(15, 4))) as currency_ratio
				   from store_sales sts
							left outer join store_returns sr
											on (sts.ss_ticket_number = sr.sr_ticket_number and
												sts.ss_item_sk = sr.sr_item_sk)
					
				   where sr.sr_return_amt > 10000
					 and sts.ss_net_profit > 1
					 and sts.ss_net_paid > 0
					 and sts.ss_quantity > 0
					 and ss_sold_date_sk = d_date_sk
					 and d_year = 2001
					 and d_moy = 12
				   group by sts.ss_item_sk
				  ) in_store
		 ) store
	where (
				  store.return_rank <= 10
				  or
				  store.currency_rank <= 10
			  )
	order by 1, 4, 5
	limit 100;

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