SQL Server-选择每个组合

下面有两个表，我试图编写一个查询，为团队中的每个人选择每一次购买。例如，它应该显示与PurchaseID1和PurchaseID2关联的角色，因为它们与TeamA在同一个团队中

这可能吗？我原以为交叉连接会起作用，但它似乎带回了太多的列。我正在运行SQL Server

多谢各位

购买

| PurchaseID    | PersonID  |
|------------   |---------- |
| 1             | TeamA     |
| 2             | TeamA     |
| 3             | PersonA   |
| 4             | PersonB   |
| 5             | TeamB     |

团队

预期结果（在PurchaseID 1上筛选时）：

---

你的数据结构有点奇怪，但我想我明白你想要什么

如果PersonA进行了购买，并且PersonA在TeamA上，那么TeamA上的每个人都应该显示为与购买关联，对吗？比如“我为我的团队买了这些甜甜圈，所以团队中的每个人都会得到一个甜甜圈”

正如您可能猜到的，您想要的是在PersonID上加入购买团队。但是，然后使用一个交叉应用函数（在内联表值函数中）返回与“当前行”中的人员在同一团队中的所有人员

我使用了两个常用的表表达式来表示您的表，以便运行它。您只需要选择零件：

with Purchases as (
      select 1 as PurchaseID, 'TeamA'   as PersonID
union select 2 as PurchaseID, 'TeamA'   as PersonID
union select 3 as PurchaseID, 'PersonA' as PersonID
union select 4 as PurchaseID, 'PersonB' as PersonID
union select 5 as PurchaseID, 'TeamB'   as PersonID
)
, Teams as (
      select 1 as TeamID, 'PersonA' as PersonID
union select 1 as TeamID, 'TeamA'   as PersonID
union select 1 as TeamID, 'PersonC' as PersonID
union select 2 as TeamID, 'PersonB' as PersonID
union select 2 as TeamID, 'TeamB'   as PersonID
)
select Purchases.PurchaseID
     , EveryTeamMember.PersonID
  from Purchases
  join Teams
    on Teams.PersonID = Purchases.PersonID
cross apply (
             select PersonID
               from Teams InnerTable
              where InnerTable.TeamID = Teams.TeamID
            ) as EveryTeamMember
where Purchases.PurchaseID = 1

---

你的数据结构有点奇怪，但我想我明白你想要什么

如果PersonA进行了购买，并且PersonA在TeamA上，那么TeamA上的每个人都应该显示为与购买关联，对吗？比如“我为我的团队买了这些甜甜圈，所以团队中的每个人都会得到一个甜甜圈”

正如您可能猜到的，您想要的是在PersonID上加入购买团队。但是，然后使用一个交叉应用函数（在内联表值函数中）返回与“当前行”中的人员在同一团队中的所有人员

我使用了两个常用的表表达式来表示您的表，以便运行它。您只需要选择零件：

with Purchases as (
      select 1 as PurchaseID, 'TeamA'   as PersonID
union select 2 as PurchaseID, 'TeamA'   as PersonID
union select 3 as PurchaseID, 'PersonA' as PersonID
union select 4 as PurchaseID, 'PersonB' as PersonID
union select 5 as PurchaseID, 'TeamB'   as PersonID
)
, Teams as (
      select 1 as TeamID, 'PersonA' as PersonID
union select 1 as TeamID, 'TeamA'   as PersonID
union select 1 as TeamID, 'PersonC' as PersonID
union select 2 as TeamID, 'PersonB' as PersonID
union select 2 as TeamID, 'TeamB'   as PersonID
)
select Purchases.PurchaseID
     , EveryTeamMember.PersonID
  from Purchases
  join Teams
    on Teams.PersonID = Purchases.PersonID
cross apply (
             select PersonID
               from Teams InnerTable
              where InnerTable.TeamID = Teams.TeamID
            ) as EveryTeamMember
where Purchases.PurchaseID = 1

---

如果您希望在PersonID以

Team

开头时获取所有团队人员，那么我认为您应该对以

Team

开头的所有PersonID和UNION（非UNION all）单人购买进行交叉应用：

DECLARE @Purchases TABLE (
    PurchaseID INT,
    PersonID Varchar(50)
)
INSERT INTO @Purchases(PersonID,PurchaseID) VALUES ('TeamA', 1);
INSERT INTO @Purchases(PersonID,PurchaseID) VALUES ('TeamA', 2);
INSERT INTO @Purchases(PersonID,PurchaseID) VALUES ('PersonA', 3);
INSERT INTO @Purchases(PersonID,PurchaseID) VALUES ('PersonB', 4);
INSERT INTO @Purchases(PersonID,PurchaseID) VALUES ('TeamB', 5);



DECLARE @Teams TABLE (
    TeamID INT,
    PersonID Varchar(50)
)
INSERT INTO @Teams(PersonID,TeamID) VALUES ('PersonA', 1);
INSERT INTO @Teams(PersonID,TeamID) VALUES ('TeamA', 1);
INSERT INTO @Teams(PersonID,TeamID) VALUES ('PersonC', 1);
INSERT INTO @Teams(PersonID,TeamID) VALUES ('PersonB', 2);
INSERT INTO @Teams(PersonID,TeamID) VALUES ('TeamB', 2);


SELECT T1.PurchaseID,TeamPersons.PersonID
FROM @Purchases T1
INNER JOIN @Teams T2
ON T2.PersonID = T1.PersonID AND T1.PersonID LIKE'Team%'
CROSS APPLY (
             SELECT PersonID
               FROM @Teams T3
              WHERE T3.TeamID = T2.TeamID
            ) AS TeamPersons

UNION 

SELECT T1.PurchaseID
     , T1.PersonID
  FROM @Purchases T1
WHERE T1.PersonID NOT LIKE 'Team%'

结果

---

如果您希望在PersonID以

团队开始时获得所有团队人员，那么我认为您应该对以
团队开始的所有PersonID和UNION（而非UNION all）单人购买进行交叉应用：

DECLARE @Purchases TABLE (
    PurchaseID INT,
    PersonID Varchar(50)
)
INSERT INTO @Purchases(PersonID,PurchaseID) VALUES ('TeamA', 1);
INSERT INTO @Purchases(PersonID,PurchaseID) VALUES ('TeamA', 2);
INSERT INTO @Purchases(PersonID,PurchaseID) VALUES ('PersonA', 3);
INSERT INTO @Purchases(PersonID,PurchaseID) VALUES ('PersonB', 4);
INSERT INTO @Purchases(PersonID,PurchaseID) VALUES ('TeamB', 5);



DECLARE @Teams TABLE (
    TeamID INT,
    PersonID Varchar(50)
)
INSERT INTO @Teams(PersonID,TeamID) VALUES ('PersonA', 1);
INSERT INTO @Teams(PersonID,TeamID) VALUES ('TeamA', 1);
INSERT INTO @Teams(PersonID,TeamID) VALUES ('PersonC', 1);
INSERT INTO @Teams(PersonID,TeamID) VALUES ('PersonB', 2);
INSERT INTO @Teams(PersonID,TeamID) VALUES ('TeamB', 2);


SELECT T1.PurchaseID,TeamPersons.PersonID
FROM @Purchases T1
INNER JOIN @Teams T2
ON T2.PersonID = T1.PersonID AND T1.PersonID LIKE'Team%'
CROSS APPLY (
             SELECT PersonID
               FROM @Teams T3
              WHERE T3.TeamID = T2.TeamID
            ) AS TeamPersons

UNION 

SELECT T1.PurchaseID
     , T1.PersonID
  FROM @Purchases T1
WHERE T1.PersonID NOT LIKE 'Team%'

结果

那么您的预期结果是什么？为什么
交叉连接
返回的列太多？来自
的
控件没有返回许多列，这就是
选择
。请务必包括您的尝试。交叉连接，并且不要在
SELECT
中使用星号，请使用列选择细化我不明白为什么
交叉连接在这里不起作用。请发布您的SQL。那么您预期的结果是什么？为什么
交叉连接
返回的列太多？来自
的
控件没有返回许多列，这就是
选择
。请务必包括您的尝试。交叉连接，并且不要在
SELECT
中使用星号，请使用列选择细化我不明白为什么
交叉连接在这里不起作用。请发布您的SQL。