SQL Server - 我可以从另一个表上的 SELECT 查询结果动态创建多个参数吗？

Question

所以我有我的“牧师”表：

CREATE TABLE Chaplaincy_Chaplains
(
ChaplainID INTEGER IDENTITY PRIMARY KEY,
ChaplainName VARCHAR(50),
FaithID INTEGER,
Telephone VARCHAR(50),
Email VARCHAR(255),
Notes VARCHAR(255),
FOREIGN KEY (FaithID) REFERENCES Chaplaincy_Faiths(FaithID)
);  

我在其中插入了四条记录：

INSERT INTO Chaplaincy_Chaplains
VALUES ('Robin Richardson',1,'555-123456','Robin.Richardson@chaplaincy.com',NULL)

INSERT INTO Chaplaincy_Chaplains
VALUES ('Peter Jackson',8,'555-123-456','Peter.Jackson@chaplaincy.com',NULL)

INSERT INTO Chaplaincy_Chaplains
VALUES ('Harry Davidson',1,'555-123-456','Harry.Davidson@chaplaincy.com',NULL)

INSERT INTO Chaplaincy_Chaplains
VALUES ('Steve Morrison',7,'555-123-456','Steve.Morrison@chaplaincy.com',NULL)

目前我已将这些记录硬编码到我的“Rota”查询中：

SELECT RotaDate,  DateDay, SlotTypeID, SlotDescription AS Hours,
    max(case when ChaplainName = 'Robin Richardson' then AvailabilityDescription end) Robin ,
    max(case when ChaplainName = 'Peter Jackson' then AvailabilityDescription end) Peter ,
    max(case when ChaplainName = 'Harry Davidson' then AvailabilityDescription end) Harry ,
    max(case when ChaplainName = 'Steve Morrison' then AvailabilityDescription end) Steve 
    FROM Chaplaincy_Rota,Chaplaincy_Availability, Chaplaincy_Chaplains, Chaplaincy_Dates, Chaplaincy_Faiths, Chaplaincy_SlotTypes
    WHERE
    RotaDate = Chaplaincy_Dates.Date AND
    RotaSlot = SlotTypeID AND
    RotaChaplain = ChaplainID AND
    RotaAvailability = AvailabilityID AND
    ChaplainFaith = Chaplaincy_Faiths.FaithID
    GROUP BY RotaDate, SlotTypeID, SlotDescription, DateDay
    ORDER BY RotaDate, SlotTypeID;

这给了我这样的东西：

                                  | Robin  | Peter | Harry   | Steve   |

01/06/2015 | Mon | 00:00 to 08:00 | Leave  | Study | On-call | Avail   |

01/06/2015 | Mon | 08:00 to 13:00 | Leave  | Study | On-call | Avail   |

01/06/2015 | Mon | 13:00 to 18:00 | Leave  | Study | On-call | Avail   |

01/06/2015 | Mon | 18:00 to 00:00 | Leave  | Study | On-call | Avail   |

02/06/2015 | Tue | 00:00 to 08:00 | On-call| Avail | Study   | Avail   |

02/06/2015 | Tue | 08:00 to 13:00 | On-call| Avail | Study   | Avail   |

02/06/2015 | Tue | 13:00 to 18:00 | On-call| Avail | Avail   | Avail   |

02/06/2015 | Tue | 18:00 to 00:00 | On-call| Avail | Avail   | Avail   |
....
et cetera

有没有一种方法可以动态更新我的“Rota”查询，这样每次我在“Chaplains”表中添加一条新记录时，该记录都会自动包含在“Rota”查询中？实际上，我希望能够向“Rota”查询添加一列，只需向 Chaplains 表添加一行即可。

非常感谢您的阅读！

Answer 1

你能检查一下吗

Declare @sql varchar(max) = ''
set @sql = 'SELECT RotaDate,  DateDay, SlotTypeID, SlotDescription AS Hours,'

select @sql = @sql + ' 
' + 'max(case when ChaplainName = '''+ChaplainName+''' then AvailabilityDescription end) '+LEFT(ChaplainName, CHARINDEX(' ', ChaplainName+ ' ') - 1)+' ,'
FROM Chaplaincy_Chaplains

SET @sql = LEFT(@sql, LEN(@sql) - 1)

SET @sql = @sql + ' ' +
    '
    FROM Chaplaincy_Rota,Chaplaincy_Availability, Chaplaincy_Chaplains, Chaplaincy_Dates, Chaplaincy_Faiths, Chaplaincy_SlotTypes
    WHERE
    RotaDate = Chaplaincy_Dates.Date AND
    RotaSlot = SlotTypeID AND
    RotaChaplain = ChaplainID AND
    RotaAvailability = AvailabilityID AND
    ChaplainFaith = Chaplaincy_Faiths.FaithID
    GROUP BY RotaDate, SlotTypeID, SlotDescription, DateDay
    ORDER BY RotaDate, SlotTypeID;'

Print @sql
EXEC (@sql)

输出：

    SELECT RotaDate,  DateDay, SlotTypeID, SlotDescription AS Hours, 
max(case when ChaplainName = 'Robin Richardson' then AvailabilityDescription end) Robin , 
max(case when ChaplainName = 'Peter Jackson' then AvailabilityDescription end) Peter , 
max(case when ChaplainName = 'Harry Davidson' then AvailabilityDescription end) Harry , 
max(case when ChaplainName = 'Steve Morrison' then AvailabilityDescription end) Steve  
    FROM Chaplaincy_Rota,Chaplaincy_Availability, Chaplaincy_Chaplains, Chaplaincy_Dates, Chaplaincy_Faiths, Chaplaincy_SlotTypes
    WHERE
    RotaDate = Chaplaincy_Dates.Date AND
    RotaSlot = SlotTypeID AND
    RotaChaplain = ChaplainID AND
    RotaAvailability = AvailabilityID AND
    ChaplainFaith = Chaplaincy_Faiths.FaithID
    GROUP BY RotaDate, SlotTypeID, SlotDescription, DateDay
    ORDER BY RotaDate, SlotTypeID;