Question

我有一个如下查询，我想给这个结果表一个别名，那我怎么能这样做呢？

这里我使用了两个带有union函数的子查询

(
      select op.order_id,op.product_id,op.quantity as ordered_quantity, sum(odp.quantity) as delivered_quantity
      from oops_order_product op 
      left join oops_order_delivery_product odp on odp.product_id = op.product_id and odp.id is null 
      where op.status = 0 
      group by op.product_id
)

union all                                                                                          
(
      SELECT op.order_id,odp.product_id,sum(op.quantity) as ordered_quantity, sum(odp.quantity) as delivered_quantity
      FROM `oops_order_delivery_product` odp
      join oops_order_delivery od on od.id = odp.order_delivery_id
      left join oops_order_product op on op.product_id = odp.product_id and op.id is null
      where odp.status = 0 group by odp.product_id
)

Answer 1

如果我正确理解你的问题，你想要这样的事情：

SELECT * FROM 
(

      select op.order_id,op.product_id,op.quantity as ordered_quantity, sum(odp.quantity) as delivered_quantity
      from oops_order_product op 
      left join oops_order_delivery_product odp on odp.product_id = op.product_id and odp.id is null 
      where op.status = 0 
      group by op.product_id


      union all                                                                                          

      SELECT op.order_id,odp.product_id,sum(op.quantity) as ordered_quantity,     sum(odp.quantity) as delivered_quantity
      FROM `oops_order_delivery_product` odp
      join oops_order_delivery od on od.id = odp.order_delivery_id
      left join oops_order_product op on op.product_id = odp.product_id and op.id is null
      where odp.status = 0 group by odp.product_id

)
as FinalTable

如何为使用多个子查询的sql结果表赋予别名？

1 个答案: