我有三张表：
A(a1, a2, a3)
//This tbl (Table) can have multiple instances of a1, but cause of its dependence on b1,
//we have a unique record each time
B(b1, a1, b2)
//tbl C has a relationship with tbl B through b1. b1 can also have multiple instances, but
//sometimes a number of unique records in this table can tie to just one record in the B tbl.
C(c1, b1, c2, c3)
示例：
//Table B sample data
b1 a1 b2
1 25 paper
2 29 pencil
3 29 parker
//Table C sample data
c1 b1 c2 c3
1 1 w long
2 2 b long
3 2 g short
4 3 v fat
说明： 对于tbl B中的记录2，tbl C中的记录2和3应该形成单个记录。
从目前为止的每一件事情来看，tbl A在tbl B中可以有多个与tbl A不同的记录.Tbl B在tbl C中也可以有多个记录，但是那些多个记录必须合并到一个记录中（在tbl C中有一个重复的外键，然后应该发生合并。）
我希望我在解释问题方面做得很好。我需要一个查询来执行此操作。有人可以帮忙吗？
增加＃1： 为了使它更清楚，我将使用我面临的真实情况。
每种药物都按主要分类，子分类和通用名称分组。
-Main Classification
-Sub Classification
-Generic Name
每个通用名称可以有多个强度： 例如：
-TRIMETHOPRIM
Strengths: 100mg, 200mg
有些时候，您可以使用两种药物组合的通用名称，这两种药物有其优势，这就像这个通用名称的强度一样。你也可以有多个。 例如：
-SULFAMETHOXAZOLE & TRIMETHOPRIM
Strengths: 40mg & 8mg/mL, 400mg & 80mg, 800mg & 160mg
因此，为了让我能够跟踪组合通用名称的各个优势，我需要另一个表格。
GenericTbl(Id, Name, ...)
GenericDetails(Id, GenericId, ...)
Strenghts(Id, GenericDetailsId, Strength, Unit, DosageForm, ...)
我希望这会有所帮助。
加法＃2 我已将id更改为整数而不是guid（uniqueidentifier）
Pharmacy_GenericDrug
GenericDrugID GenericDrugName DrugSubClassificationID ControlStatusID
1 TRIMETHOPRIM 12 2
2 SULFAME & TRIMETHOPRIM 4 1
Pharmacy_GenericDrugDetails
GenericDrugDetailsID GenericDrugID
1 1
2 2
Pharmacy_Strengths
StrengthID GenericDrugDetailsID DosageStrength Unit
1 1 200 mg
2 2 80 mg
3 2 8 mg/L
For the first#1 GenericDrugID = 1: TRIMETHOPRIM | 12 | 200 | mg | 1
For the second#2 GenericDrugID = 2: SULFAME & TRIMETHOPRIM | 4 | 80 | mg | 8 | mg/L | 1
1 > GenericDrugName | DrugSubClassificationID | DosageSrength | Unit | ControlStatusID
2 > GenericDrugName | DrugSubClassificationID | DosageSrength | Unit | DosageSrength | Unit | ControlStatusID
答案 0 :(得分：1)
这是基于外键合并两行的查询（违反1NF规则）。
DECLARE @StrengthID INT
DECLARE @GenericDrugDetailsID INT
DEClARE @DosageStrength INT
DECLARE @PresentationUnitID INT
DECLARE @DosageFormID INT
DECLARE @RouteOfAdministrationID INT
DECLARE @nCombinations INT
DECLARE @maxCombinations INT
DECLARE @CurrCombinationTotal INT
DECLARE @CurrGenericDrugDetailsID INT
DECLARE @PName VARCHAR(100)
DECLARE @DName VARCHAR(100)
DECLARE @DNameAbbrev VARCHAR(50)
DECLARE @RName VARCHAR(100)
DECLARE @GetGenericDrugStrengths CURSOR
SET @nCombinations = 0
SET @CurrGenericDrugDetailsID = 0
--Get the maximum number of combinations
--=====================================================================================
SET @maxCombinations = (SELECT TOP 1 COUNT(GenericDrugDetailsID) AS maxCombinations
FROM Pharmacy_Strengths
GROUP BY GenericDrugDetailsID
ORDER BY maxCombinations desc)
--=====================================================================================
--Create a temporary temp to hold the strengths
--=====================================================================================
DECLARE @tmpSQL VARCHAR(max)
SET @tmpSQL = ''
IF EXISTS (SELECT * FROM tempdb.sys.tables WHERE NAME LIKE '%tmpStrengths%')
DROP TABLE #tmpStrengths
CREATE TABLE #tmpStrengths (
StrengthID INT NOT NULL,
GenericDrugDetailsID INT NOT NULL,
NumberOfCombinations INT NOT NULL,
DosageStrength1 INT NOT NULL,
PresentationUnitID1 INT NOT NULL,
PresentationUnitName1 VARCHAR(100) NOT NULL,
DosageFormID1 INT NOT NULL,
DosageFormName1 VARCHAR(100) NOT NULL,
DosageFormNameAbbrev1 VARCHAR(50) NULL,
RouteOfAdministrationID1 INT NOT NULL,
RouteOfAdministrationName1 VARCHAR(100) NOT NULL);
IF (@maxCombinations > 1)
BEGIN
DECLARE @counter int
SET @counter = 1
WHILE @counter < @maxCombinations
BEGIN
SET @counter = @counter + 1
SET @tmpSQL = @tmpSQL + 'ALTER TABLE #tmpStrengths ADD StrengthID' + CAST(@counter AS VARCHAR(50)) + ' INT NULL;'
SET @tmpSQL = @tmpSQL + 'ALTER TABLE #tmpStrengths ADD DosageStrength' + CAST(@counter AS VARCHAR(50)) + ' INT NULL;'
SET @tmpSQL = @tmpSQL + 'ALTER TABLE #tmpStrengths ADD PresentationUnitID' + CAST(@counter AS VARCHAR(50)) + ' INT NULL; '
SET @tmpSQL = @tmpSQL + 'ALTER TABLE #tmpStrengths ADD PresentationUnitName' + CAST(@counter AS VARCHAR(100)) + ' VARCHAR(100) NULL; '
SET @tmpSQL = @tmpSQL + 'ALTER TABLE #tmpStrengths ADD DosageFormID' + CAST(@counter AS VARCHAR(50)) + ' INT NULL; '
SET @tmpSQL = @tmpSQL + 'ALTER TABLE #tmpStrengths ADD DosageFormName' + CAST(@counter AS VARCHAR(100)) + ' VARCHAR(100) NULL; '
SET @tmpSQL = @tmpSQL + 'ALTER TABLE #tmpStrengths ADD DosageFormNameAbbrev' + CAST(@counter AS VARCHAR(50)) + ' VARCHAR(50) NULL; '
SET @tmpSQL = @tmpSQL + 'ALTER TABLE #tmpStrengths ADD RouteOfAdministrationID' + CAST(@counter AS VARCHAR(50)) + ' INT NULL; '
SET @tmpSQL = @tmpSQL + 'ALTER TABLE #tmpStrengths ADD RouteOfAdministrationName' + CAST(@counter AS VARCHAR(100)) + ' VARCHAR(100) NULL; '
END
END
EXEC(@tmpSQL)
--====================================================================================
SET @tmpSQL = ''
SET @GetGenericDrugStrengths = CURSOR FOR
SELECT StrengthID, GenericDrugDetailsID, DosageStrength, PresentationUnitID, DosageFormID, RouteOfAdministrationID
FROM Pharmacy_Strengths
ORDER BY GenericDrugDetailsID ASC
OPEN @GetGenericDrugStrengths
FETCH NEXT FROM @GetGenericDrugStrengths INTO @StrengthID, @GenericDrugDetailsID, @DosageStrength, @PresentationUnitID, @DosageFormID, @RouteOfAdministrationID
WHILE @@FETCH_STATUS = 0
BEGIN
--Get the values of Presentation Unit, Dosage Form, and Route of Administration.
SELECT @PName = PresentationUnitName
FROM Pharmacy_PresentationUnit
WHERE PresentationUnitID = @PresentationUnitID
SELECT @DName = DosageFormName, @DNameAbbrev = DosageFormNameAbbrev
FROM Pharmacy_DosageForm
WHERE DosageFormID = @DosageFormID
SELECT @RName = RouteOfAdministrationName
FROM Pharmacy_RouteOfAdministration
WHERE RouteOfAdministrationID = @RouteOfAdministrationID
IF (@GenericDrugDetailsID = @CurrGenericDrugDetailsID)
BEGIN
SET @nCombinations = (@nCombinations + 1)
--Alter the temporary table now
SET @tmpSQL = @tmpSQL + 'UPDATE #tmpStrengths
SET StrengthID' + CAST(@nCombinations AS VARCHAR(50)) + ' = ' + CAST(@StrengthID AS VARCHAR(50)) + ',
DosageStrength' + CAST(@nCombinations AS VARCHAR(50)) + ' = ' + CAST(@DosageStrength AS VARCHAR(50)) + ',
PresentationUnitID' + CAST(@nCombinations AS VARCHAR(50)) + ' = ' + CAST(@PresentationUnitID AS VARCHAR(50)) + ',
PresentationUnitName' + CAST(@nCombinations AS VARCHAR(50)) + ' = ''' + CAST(@PName AS VARCHAR(100)) + ''',
DosageFormID' + CAST(@nCombinations AS VARCHAR(50)) + ' = ' + CAST(@DosageFormID AS VARCHAR(50)) + ',
DosageFormName' + CAST(@nCombinations AS VARCHAR(50)) + ' = ''' + CAST(@DName AS VARCHAR(100)) + ''',
DosageFormNameAbbrev' + CAST(@nCombinations AS VARCHAR(50)) + ' = ''' + CAST(@DNameAbbrev AS VARCHAR(50)) + ''',
RouteOfAdministrationID' + CAST(@nCombinations AS VARCHAR(50)) + ' = ' + CAST(@RouteOfAdministrationID AS VARCHAR(50)) + ',
RouteOfAdministrationName' + CAST(@nCombinations AS VARCHAR(50)) + ' = ''' + CAST(@RName AS VARCHAR(100)) + '''
WHERE GenericDrugDetailsID = ' + CAST(@GenericDrugDetailsID AS VARCHAR(50));
EXEC(@tmpSQL);
END
ELSE
BEGIN
SET @nCombinations = 1
SET @CurrGenericDrugDetailsID = @GenericDrugDetailsID;
--Get the total number of combinations in advance
SET @CurrCombinationTotal = (SELECT COUNT(GenericDrugDetailsID)
FROM Pharmacy_Strengths
WHERE GenericDrugDetailsID = @GenericDrugDetailsID
GROUP BY GenericDrugDetailsID);
--Insert in the temporary table now
INSERT INTO #tmpStrengths (StrengthID, GenericDrugDetailsID, NumberOfCombinations,
DosageStrength1, PresentationUnitID1, PresentationUnitName1, DosageFormID1,
DosageFormName1, DosageFormNameAbbrev1, RouteOfAdministrationID1, RouteOfAdministrationName1)
VALUES (@StrengthID, @GenericDrugDetailsID, @CurrCombinationTotal, @DosageStrength,
@PresentationUnitID, @PName, @DosageFormID, @DName, @DNameAbbrev, @RouteOfAdministrationID, @RName)
END
--PRINT CAST(@StrengthID AS varchar(50)) + ' ' + CAST(@GenericDrugDetailsID AS varchar(50)) + ' ' + CAST(@DosageStrength AS varchar(50)) + ' ' + CAST(@PresentationUnitID AS varchar(50)) + ' ' + CAST(@DosageFormID as varchar(50)) + ' ' + CAST(@RouteOfAdministrationID as varchar(50))
FETCH NEXT FROM @GetGenericDrugStrengths INTO @StrengthID, @GenericDrugDetailsID, @DosageStrength, @PresentationUnitID, @DosageFormID, @RouteOfAdministrationID
END
--SELECT * from #tmpStrengths
CLOSE @GetGenericDrugStrengths
DEALLOCATE @GetGenericDrugStrengths
SELECT a.GenericDrugID,
a.GenericDrugName,
f.*,
a.InsertDate,
a.InsertFKUserAccountId,
a.UpdateDate,
a.UpdateFKUserAccountId,
a.Version
FROM Pharmacy_GenericDrug a
INNER JOIN Pharmacy_ControlStatus d ON d.ControlStatusID = a.ControlStatusID
INNER JOIN Pharmacy_GenericDrugDetails e ON e.GenericDrugID = a.GenericDrugID
INNER JOIN #tmpStrengths f ON f.GenericDrugDetailsID = e.GenericDrugDetailsID
ORDER BY GenericDrugName ASC
这是我在查询之前得到的：
GenericDrugID GenericDrugName DrugSubClassificationID DrugSubClassificationName DrugClassificationID DrugClassificationName GenericDrugDetailsID DosageStrength PresentationUnitID PresentationUnitName DosageFormID DosageFormName DosageFormNameAbbrev RouteOfAdministrationID RouteOfAdministrationName ControlStatusID ControlStatusName InsertDate InsertFKUserAccountId UpdateDate UpdateFKUserAccountId Version
------------------------------------ ---------------------------------------------------------------------------------------------------- ------------------------------------ -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------ -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- -------------------- -------------- ------------------ ---------------------------------------------------------------------------------------------------- ------------ ---------------------------------------------------------------------------------------------------- -------------------------------------------------- ----------------------- ---------------------------------------------------------------------------------------------------- --------------- ---------------------------------------------------------------------------------------------------- ----------------------- --------------------- ----------------------- --------------------- -----------------------
83222B76-6690-42F2-BDAD-BE5BD2D19D3B Generic Drug One 8ED135ED-5FDB-419A-9C7D-E788A40EAEAC Drug Subclassification Two 61D618F3-A38A-4416-B0A4-FB29AD614B4B Drug Classification One 2 300 1 ml 2 Pill Pill 1 Mouth 3 Narcotic 2009-10-25 10:10:06.077 1 2009-11-15 07:06:03.733 1 2009-10-25 10:10:06.077
83222B76-6690-42F2-BDAD-BE5BD2D19D3B Generic Drug One 8ED135ED-5FDB-419A-9C7D-E788A40EAEAC Drug Subclassification Two 61D618F3-A38A-4416-B0A4-FB29AD614B4B Drug Classification One 2 400 1 ml 2 Pill Pill 1 Mouth 3 Narcotic 2009-10-25 10:10:06.077 1 2009-11-15 07:06:03.733 1 2009-10-25 10:10:06.077
83222B76-6690-42F2-BDAD-BE5BD2D19D3B Generic Drug One 8ED135ED-5FDB-419A-9C7D-E788A40EAEAC Drug Subclassification Two 61D618F3-A38A-4416-B0A4-FB29AD614B4B Drug Classification One 4 500 1 ml 2 Pill Pill 2 Injection 3 Narcotic 2009-10-25 10:10:06.077 1 2009-11-15 07:06:03.733 1 2009-10-25 10:10:06.077
A1D86FD2-2E65-4F2A-B7A2-7B083B71AB9B Generic Drug Two 9925D762-34B8-43B4-A96B-78374F0081B0 Drug Subclassification One C10E9F1B-3985-4DB8-8EF8-A6C82B004B9F Drug Classification Two 1 200 1 ml 2 Pill Pill 1 Mouth 2 None 2009-10-25 10:47:10.623 1 2009-11-15 04:02:47.890 1 2009-10-25 10:47:10.623
这就是我现在所得到的：
GenericDrugID GenericDrugName DrugSubClassificationID DrugSubClassificationName DrugClassificationID DrugClassificationName StrengthID GenericDrugDetailsID NumberOfCombinations DosageStrength1 PresentationUnitID1 PresentationUnitName1 DosageFormID1 DosageFormName1 DosageFormNameAbbrev1 RouteOfAdministrationID1 RouteOfAdministrationName1 StrengthID2 DosageStrength2 PresentationUnitID2 PresentationUnitName2 DosageFormID2 DosageFormName2 DosageFormNameAbbrev2 RouteOfAdministrationID2 RouteOfAdministrationName2 InsertDate InsertFKUserAccountId UpdateDate UpdateFKUserAccountId Version
------------------------------------ ---------------------------------------------------------------------------------------------------- ------------------------------------ -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------ -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ----------- -------------------- -------------------- --------------- ------------------- ---------------------------------------------------------------------------------------------------- ------------- ---------------------------------------------------------------------------------------------------- -------------------------------------------------- ------------------------ ---------------------------------------------------------------------------------------------------- ----------- --------------- ------------------- ---------------------------------------------------------------------------------------------------- ------------- ---------------------------------------------------------------------------------------------------- -------------------------------------------------- ------------------------ ---------------------------------------------------------------------------------------------------- ----------------------- --------------------- ----------------------- --------------------- -----------------------
83222B76-6690-42F2-BDAD-BE5BD2D19D3B Generic Drug One 8ED135ED-5FDB-419A-9C7D-E788A40EAEAC Drug Subclassification Two 61D618F3-A38A-4416-B0A4-FB29AD614B4B Drug Classification One 2 2 2 300 1 ml 2 Pill Pill 1 Mouth 3 400 1 ml 2 Pill Pill 1 Mouth 2009-10-25 10:10:06.077 1 2009-11-15 07:06:03.733 1 2009-10-25 10:10:06.077
83222B76-6690-42F2-BDAD-BE5BD2D19D3B Generic Drug One 8ED135ED-5FDB-419A-9C7D-E788A40EAEAC Drug Subclassification Two 61D618F3-A38A-4416-B0A4-FB29AD614B4B Drug Classification One 4 4 1 500 1 ml 2 Pill Pill 2 Injection NULL NULL NULL NULL NULL NULL NULL NULL NULL 2009-10-25 10:10:06.077 1 2009-11-15 07:06:03.733 1 2009-10-25 10:10:06.077
A1D86FD2-2E65-4F2A-B7A2-7B083B71AB9B Generic Drug Two 9925D762-34B8-43B4-A96B-78374F0081B0 Drug Subclassification One C10E9F1B-3985-4DB8-8EF8-A6C82B004B9F Drug Classification Two 1 1 1 200 1 ml 2 Pill Pill 1 Mouth NULL NULL NULL NULL NULL NULL NULL NULL NULL 2009-10-25 10:47:10.623 1 2009-11-15 04:02:47.890 1 2009-10-25 10:47:10.623
对于那些感兴趣的人，这些是表结构：
CREATE TABLE [dbo].[Pharmacy_GenericDrug](
[GenericDrugID] [uniqueidentifier] NOT NULL CONSTRAINT [DF__Pharmacy___Gener__4E53A1AA] DEFAULT (newid()),
[GenericDrugName] [varchar](100) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
[DrugSubClassificationID] [uniqueidentifier] NOT NULL,
[ControlStatusID] [int] NOT NULL,
[InsertDate] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_GenericDrug_InsertDate] DEFAULT (getdate()),
[InsertFKUserAccountId] [int] NOT NULL,
[UpdateDate] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_GenericDrug_UpdateDate] DEFAULT (getdate()),
[UpdateFKUserAccountId] [int] NOT NULL,
[Version] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_GenericDrug_Version] DEFAULT (getdate())
)
CREATE TABLE [dbo].[Pharmacy_GenericDrugDetails](
[GenericDrugDetailsID] [int] IDENTITY(1,1) NOT NULL,
[GenericDrugID] [uniqueidentifier] NOT NULL,
[InsertDate] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_GenericDrugDetails_InsertDate] DEFAULT (getdate()),
[InsertFKUserAccountId] [int] NOT NULL,
[UpdateDate] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_GenericDrugDetails_UpdateDate] DEFAULT (getdate()),
[UpdateFKUserAccountId] [int] NOT NULL,
[Version] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_GenericDrugDetails_Version] DEFAULT (getdate())
)
CREATE TABLE [dbo].[Pharmacy_Strengths](
[StrengthID] [int] IDENTITY(1,1) NOT NULL,
[GenericDrugDetailsID] [int] NOT NULL,
[DosageStrength] [int] NOT NULL,
[PresentationUnitID] [int] NOT NULL,
[DosageFormID] [int] NOT NULL,
[RouteOfAdministrationID] [int] NOT NULL,
[InsertDate] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_StrengthCombination_InsertDate] DEFAULT (getdate()),
[InsertFKUserAccountId] [int] NOT NULL,
[UpdateDate] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_StrengthCombination_UpdateDate] DEFAULT (getdate()),
[UpdateFKUserAccountId] [int] NOT NULL,
[Version] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_StrengthCombination_Version] DEFAULT (getdate())
)
CREATE TABLE [dbo].[Pharmacy_PresentationUnit](
[PresentationUnitID] [int] IDENTITY(1,1) NOT NULL,
[PresentationUnitName] [varchar](100) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
[InsertDate] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_PresentationUnit_InsertDate] DEFAULT (getdate()),
[InsertFKUserAccountId] [int] NOT NULL,
[UpdateDate] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_PresentationUnit_UpdateDate] DEFAULT (getdate()),
[UpdateFKUserAccountId] [int] NOT NULL,
[Version] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_PresentationUnit_Version] DEFAULT (getdate())
)
CREATE TABLE [dbo].[Pharmacy_DosageForm](
[DosageFormID] [int] IDENTITY(1,1) NOT NULL,
[DosageFormName] [varchar](100) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
[DosageFormNameAbbrev] [varchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
[InsertDate] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_DosageForm_InsertDate] DEFAULT (getdate()),
[InsertFKUserAccountId] [int] NOT NULL,
[UpdateDate] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_DosageForm_UpdateDate] DEFAULT (getdate()),
[UpdateFKUserAccountId] [int] NOT NULL,
[Version] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_DosageForm_Version] DEFAULT (getdate())
)
CREATE TABLE [dbo].[Pharmacy_RouteOfAdministration](
[RouteOfAdministrationID] [int] IDENTITY(1,1) NOT NULL,
[RouteOfAdministrationName] [varchar](100) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
[InsertDate] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_RouteOfAdministration_InsertDate] DEFAULT (getdate()),
[InsertFKUserAccountId] [int] NOT NULL,
[UpdateDate] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_RouteOfAdministration_UpdateDate] DEFAULT (getdate()),
[UpdateFKUserAccountId] [int] NOT NULL,
[Version] [datetime] NOT NULL CONSTRAINT [DF_Pharmacy_RouteOfAdministration_Version] DEFAULT (getdate())
)
答案 1 :(得分：0)
好的，让我们试一下，看看这是否让我们无处可去。
表A： GenericTbl（Id，Name，...）
表B： GenericDetails（Id，GenericId，...）
表C： 优势（Id，GenericDetailsId，Strength，Unit，DosageForm，...）
如果当你说合并时你正在寻找一个输出集，它将结果放在一起以获得单个通用的优势，你可以做一些事情
SELECT
g.Id,
g.Name,
gd.Id,
s.Strength,
s.Unit,
s.OtherFields /*fill in the blanks*/
FROM
GenericTbl g
INNER JOIN GenericDetails gd
on g.Id=gd.GenericId
INNER JOIN Strengths s
ON gd.Id=s.GenericDetailsId
ORDER BY
g.Id, gd.Id, s.Id
并且它会为您提供单个结果集，列出每个泛型的所有不同强度，将其类型分组，每行结果在一行。
如果您想要的是每个类型的单行，并且列可以告诉您可用的选项，那么它应该可以使用游标和临时表，或者我认为可以从内存中使用。
如果您真正想要的是将记录合并到插入数据库中，那么您只有一个包含所有数据的基础记录，那么您可以通过触发器来完成，但我不能完全看看为什么你想要，因为你最终得到了B和C的1：1映射，并且可能只是将它们作为单个表。
答案 2 :(得分：0)
以下是使用SQLXML的另一种解决方案：
SELECT
STUFF
(
(
SELECT ', ' + cast(id AS NVARCHAR(max)) + ': ' + video
FROM Video
ORDER BY Id
FOR XML PATH ('')
),1,1,''
)
CREATE TABLE [dbo].[Video](
[ID] [int] NOT NULL,
[Video] [varchar](50) NOT NULL,
[Views] [int] NOT NULL
)
结果： 1：绿巨人，2：杰克，3：国王
更新： 我还在数据管理和交换中找到了this。