SQL 根据列条件检索行

Question

假设我有以下 tables

订单Table

OrderNo  CategoryID  CountryID  ServiceTypeID
 100         1         3             1
 200         2         5             2
 300         3         4             4
 400         1         2             9

1个服务类型可能属于多个类别类型

类别Table

 ID   Name  ServiceTypeID
 1     x        1
 2     x        2
 3     x        1

服务类型table

 ID    Name
 1     xx
 2     xx
 3     xx

追踪Table

OrderNo  CountryID   TrackingTypeID
 100        2             3
 200        1             4
 100        3             2
 400        5             1
 200        2             6

已审核Table

OrderNo 
 300
 100
 200

我想编写符合以下要求的查询

订单必须属于 serviceTypeID = 1 或 2

并且如果 orderNo 有一个 categoryID = 1

我希望仅在以下情况下检索该记录有一个跟踪记录 table orderNo 与 Order table

中的 countryID 相同

并且如果该订单号在跟踪中没有跟踪类型 id (0,7,1) table

Else 对于具有任何其他类别的所有其他订单，不包括不属于的订单到 serviceTypeID = (1,2) 我希望只有在以下情况下才能检索该记录该 orderNo 的现有记录在已审核 table

并且如果该订单号在跟踪中没有跟踪类型 id (0,7,1) table

所以基本上基于以上要求，结果应该是这样的

OrderNo   CategoryID  StationID   
 100         1           3          
 200         2           5



select DISTINCT top 10000  o.orderNo , o.categoryID , o.serviceTypeid 
,o.countrtId , Tracking.countryId
from Order o
join Tracking on o.orderNo = Tracking.orderNo 

where

(o.CategoryID in (1 ) and o.countryId = Tracking.countryId 
       and
       exists (select 1
               from tracking t
               where t.orderNo = o.orderNo and t.countryId  = 
               o.countryId 
              )
      )

  OR
  (o.categoryID  in (select id from Category where ServiceTypeid in (7,8) and 
    ID not in (56 , 65)
    ) and
    exists (select 1
           from Reviewed r
           where r.orderNo = o.orderNo 
          )
  ) 

 AND not exists
                ( select 1
                 from tracking t
                 WHERE T.orderNo = o.orderNo 
                 and t.TrackingTypeID in (0 , 7 ,25))

该查询似乎 return 只有 ID 为 1 的订单，即使它的 trackingTypeID = 0,7,25

Answer 1

您可以使用 exists 和布尔逻辑：

select o.*
from orders o
where 
    (
        category_id = 1 
        and exists (select 1 from tracking t where t.order_no = o.order_no and t.country_id = o.country_id)
    )
    or (
        category_id = 2
        and exists (select 1 from reviewed r where r.order_no = o.order_no)
    )

Answer 2

根据您的条件，您可以使用布尔逻辑 exists:

select o.*
from orders o
where (o.categoryid = 1 and
       exists (select 1
               from tracking t
               where t.orderno = o.orderno and t.CountryID = o.CountryID
              )
      ) or
      (o.categoryid = 2 and
       exists (select 1
               from reviewed r
               where r.orderno = o.orderno 
              )
      ) ;

Answer 3

根据您的条件，此查询将给出相应的结果：

Select o.OrderNo,o.CategoryID,o.CountryID as StationID
    from Order o
    inner join Tracking t on t.OrderNo = o.OrderNo and t.CountryID = o.CountryID
    where o.CategoryID = 1 or (o.CategoryID = 2 
    and exists (Select * from Reviewed where OrderNo = o.OrderNo))

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