Question

好的，这是你发光的时候了！

不是的，我正在接受一个我似乎无法开始工作的MS-SQL查询。

我要做的是搜索患者姓名;但也要将具有相似名字或姓氏的患者归还给查询患者的姓氏。因此，“约翰史密斯”可以归还任何名为“约翰史密斯”的人或任何名字如“史密斯”的人。如果患者具有多种疾病状态，则将这些疾病状态组合成单个列。我有以下表格（虽然当然有更多列，但这些是最重要的）：

Patient Table
PatientID    FirstName    LastName    UserIDFK
10000        John         Smith       1
10001        Miss         Smith       2
10002        Smith        Bomb        3
10003        Bobby        Smith       4
-- etc

DiseaseStateForUser
UserIDFK    DiseaseStateRefId
1           1
1           2
2           2
3           1
3           2
4           1

GlobalLookUp
RefId    Ref_Code
1        HIV
2        HEPC

我正在寻找的结果是：

PatientID    FirstName    LastName    DiseaseStates
10000        John         Smith       HIV|HEPC
10001        Miss         Smith       HEPC
10002        Smith        Bomb        HIV|HEPC
10003        Bobby        Smith       HIV

我从这些问题（以及无数其他问题）中采用了这些例子：

除了这篇博文Emulating MySQL’s GROUP_CONCAT() Function in SQL Server 2005之外，我还提出了以下SQL过程

DECLARE 
    @PatientID          INT=null,           
    @FirstName          Varchar(15)= null,
    @LastName           Varchar(15)= 'Smith',
    @Name           Varchar(15) = 'John Smith',

Select
    Patient.First_Name,
    Patient.Last_Name, 
    patient.PatientID,      
    (select CAST(GlobalLookUp.Ref_Code + '|' as VARCHAR(MAX))
     from 
        TBL_PATIENT patient
        ,TBL_GBLLOOKUP GlobalLookUp
        ,TBL_DiseaseStateForUser DiseaseStateForUser
        -- Try and make a collection of all the PatientIDs
        -- that match the search criteria 
        -- so that only these are used to build
        -- the DiseaseStatesColumn
        ,(Select
            Patient.PatientID
                FROM TBL_PATIENT patient
                    ,TBL_SITEMASTER SiteMaster 
                    ,TBL_USERMASTER UserMaster
                    ,TBL_USERSINSITES UserInSites
                    ,TBL_GBLLOOKUP GlobalLookUp
                    ,TBL_DiseaseStateForUser DiseaseStateForUser
                WHERE   (((patient.[Last_Name] like @LastName + '%') OR (patient.[Last_Name] Like @Name + '%' ))
                            OR ((patient.[First_Name] Like @Name + '%' ))
                            OR  (patient.[First_Name] + ' ' + patient.[Last_Name] Like @Name + '%' ))
                    AND     UserMaster.User_Id = UserInSites.User_Id_FK
                    AND     UserInSites.Site_Id_FK = SiteMaster.Site_Id
                    AND     UserInSites.Is_Active = 'True'
                    AND     patient.[User_Id_FK] = UserMaster.[User_Id] 
                    AND     (DiseaseStateForUser.User_Id_FK = patient.User_Id_FK
                    AND     DiseaseStateForUser.DiseaseState_RefId_FK = GlobalLookUp.Ref_Id)
                    and     DiseaseStateForUser.Is_Active='True'
                    AND     patient.[Is_Active] = 'TRUE'
            group by Patient.PatientID) as PATIENTIDs
    where patient.PatientID = PATIENTIDs.PatientID  
            AND     (DiseaseStateForUser.User_Id_FK = patient.User_Id_FK
            AND     DiseaseStateForUser.DiseaseState_RefId_FK = GlobalLookUp.Ref_Id)
    For XML PATH('')) as MultiDiseaseState

FROM TBL_PATIENT patient, TBL_SITEMASTER SiteMaster ,TBL_USERMASTER UserMaster,TBL_USERSINSITES UserInSites, TBL_GBLLOOKUP GlobalLookUp, TBL_DiseaseStateForUser DiseaseStateForUser
WHERE   (((patient.[Last_Name] like @LastName + '%') OR (patient.[Last_Name] Like @Name + '%' ))
            or ((patient.[First_Name] Like @Name + '%' ))
            OR  (patient.[First_Name] + ' ' + patient.[Last_Name] Like @Name + '%' ))
    AND     patient.PatientID = patient.PatientID
    AND         UserMaster.User_Id = UserInSites.User_Id_FK
    AND     UserInSites.Site_Id_FK = SiteMaster.Site_Id
    AND     UserInSites.Is_Active = 'True'
    AND     patient.[User_Id_FK] = UserMaster.[User_Id] 
    AND     DiseaseStateForUser.User_Id_FK = patient.User_Id_FK
    AND     DiseaseStateForUser.DiseaseState_RefId_FK = GlobalLookUp.Ref_Id
    and     DiseaseStateForUser.Is_Active='True'
    AND     patient.[Is_Active] = 'TRUE'
group by PatientID, patient.First_Name, patient.Last_Name, GlobalLookUp.Ref_Code
order by PatientID

不幸的是，这个查询让我知道以下内容：

PatientID    FirstName    LastName    MultiDiseaseState
10000        John         Smith       HIV|HEPC|HEPC|HIV|HEPC|HIV
10001        Miss         Smith       HIV|HEPC|HEPC|HIV|HEPC|HIV
10002        Smith        Bomb        HIV|HEPC|HEPC|HIV|HEPC|HIV
10003        Bobby        Smith       HIV|HEPC|HEPC|HIV|HEPC|HIV

换句话说，select CAST(GlobalLookUp.Ref_Code + '|' as VARCHAR(MAX))调用正在构建MultiDiseaseState列，其中包含所选患者所有的所有疾病状态。

我知道最内部的SELECT语句存在根本性的错误，但是我很难弄清楚它是什么以及如何编写查询以便它只构建给定患者的疾病状态。

有点长篇文章，但考虑到我提供的代码片段，人们可以提出任何建议吗？

Answer 1

你应该能够使用Stuff功能（我认为它只在SQL 2005及更高版本上）来完成这项工作，我拿了你的示例数据并写了一个演示

    SET NOCOUNT ON

CREATE TABLE #Patient
(
PatientID INT,
FirstName varchar(25),
LastName varchar(25),
UserIDFK INT
)
INSERT INTO #PATIENT SELECT 10000,'John','Smith',1 
INSERT INTO #PATIENT SELECT 10001,'Miss','Smith',2 
INSERT INTO #PATIENT SELECT 10002,'Smith','Bomb',3 
INSERT INTO #PATIENT SELECT 10003,'Bobby','Smith',4 

CREATE TABLE #DiseaseStateForUser 
(
UserIDFK int,
DiseaseStateRefId int
)

INSERT INTO #DiseaseStateForUser SELECT 1,1 
INSERT INTO #DiseaseStateForUser SELECT 1,2 
INSERT INTO #DiseaseStateForUser SELECT 2,2 
INSERT INTO #DiseaseStateForUser SELECT 3,1 
INSERT INTO #DiseaseStateForUser SELECT 3,2 
INSERT INTO #DiseaseStateForUser SELECT 4,1 

CREATE TABLE #GlobalLookUp
(
RefId int,
Ref_Code varchar(10)
)
INSERT INTO #GlobalLookUp SELECT 1,'HIV'
INSERT INTO #GlobalLookUp SELECT 2,'HEPC'


SELECT 
    PatientID,
    UserIDFK,
    FirstName,
    LastName,
    STUFF(
    (SELECT '|' + l.Ref_Code 
    FROM #DiseaseStateForUser u with (Nolock) 
    JOIN dbo.#GlobalLookUp l with (nolock)
        ON u.DiseaseStateRefId = l.RefId
    WHERE u.UserIDFK = p.UserIDFK FOR XML PATH('')
    )
    , 1, 1, '')
FROM #PATIENT p with (Nolock)
GROUP BY PatientID, FirstName, LastName, UserIDFK

使用CAST将行组合成一列时遇到问题（

1 个答案: