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我嘗試混合兩種查詢,PostgreSQL連接兩個查詢的PostgreSQL
select stock_quant.product_id as prod_id, product_product.name_template as name ,sum(stock_quant.qty) as qty_quant
from stock_quant
join product_product on stock_quant.product_id = product_product.id
join stock_location on stock_quant.location_id = stock_location.id
where stock_location.usage in ('internal','transit')
group by stock_quant.product_id, product_product.name_template
order by stock_quant.product_id
這一個讓我產品和用量數據在表stock_quant ,第二個查詢得到我quntity的總和在其他表「stock_history」
select stock_history.product_id as prod_id,product_product.name_template as name , sum(stock_history.quantity) as qty_history
from stock_history
join product_product on stock_history.product_id = product_product.id
group by stock_history.product_id,name
order by stock_history.product_id
好,什麼即時試圖做的是隻顯示這兩者之和相等的同一種產品的產品OFC 日Thnx我真的很感激一些解釋
你們更多的解釋好了,如果你會提供的表的模式,那本來是好的。 –