如何正確加入三個不同的查詢

Question

我正在使用SQL Server 2008.我有三個不同的查詢，我想聯合在一起，但我不確定如何正確地去做，因爲查詢的結構是不同的。 我的第一個查詢創建了兩個表來插入記錄進行比較，其中返回訪問列的MAX。例如：

查詢：

SET ANSI_NULLS OFF 
GO 

-- VARIABLE DECLARATION 
DECLARE @STARTDATE DATETIME 
DECLARE @ENDDATE DATETIME 

-- VARIABLE INITIALIZATION 
SET @STARTDATE = '6/1/12'; 
SET @ENDDATE = '1/1/13'; 

--############################################################################################# 
-- TABLE DECLARATION WHICH WILL BE USED TO GET THE MAX ORDERED DATE       # 
--                       # 
DECLARE @T1 TABLE (ENCOUNTER VARCHAR(200), PT_NAME VARCHAR(500), MRN VARCHAR(200),   --# 
        LOS VARCHAR(200), PT_LOC VARCHAR(500), PT_DISPO VARCHAR(500),   --# 
        LAB_NAME VARCHAR(500), LAB_VALUE VARCHAR(40),LOWER_LIMIT VARCHAR(30), --# 
        UPPER_LIMIT VARCHAR(30), HISTORY VARCHAR(10), HAS_HISTORY VARCHAR(10), --# 
        AB_CODE VARCHAR(30), ORDER_ENTERED VARCHAR(500))       --# 
DECLARE @T2 TABLE (ENCOUNTER2 VARCHAR(200), PT_NAME2 VARCHAR(500), MRN2 VARCHAR(200),  --# 
        LOS2 VARCHAR(200), PT_LOC2 VARCHAR(500), PT_DISPO2 VARCHAR(500),   --# 
        LAB_NAME2 VARCHAR(500), LAB_VALUE2 VARCHAR(40),LOWER_LIMIT2 VARCHAR(30), --# 
        UPPER_LIMIT2 VARCHAR(30), HISTORY2 VARCHAR(10), HAS_HISTORY2 VARCHAR(10),--# 
        AB_CODE2 VARCHAR(30), ORDER_ENTERED2 VARCHAR(500))      --# 
--                       # 
--############################################################################################# 

--##  TABLE INSERTIONS  ## 
--########################################################################################### 
--## WHAT GETS PUT INTO TABLE 1 ## 
INSERT INTO @T1 
SELECT 
A.VisitIDCode, 
A.ClientDisplayName, 
A.IDCode, 
A.LOS, 
A.CurrentLocation, 
A.DischargeDisposition, 
A.ItemName, 
A.Value, 
A.ReferenceLowerLimit, 
A.ReferenceUpperLimit, 
A.IsHistory, 
A.HasHistory, 
A.AbnormalityCode, 
A.Entered 

FROM 
(
-- COLUMN SELECTION 
SELECT CV.VisitIDCode, CV.ClientDisplayName, CV.IDCode,DATEDIFF(DD,CV.ADMITDTM,CV.DISCHARGEDTM)AS 'LOS', 
CV.CurrentLocation, CV.DischargeDisposition, BO.ItemName, BO.Value, 
BO.ReferenceLowerLimit, BO.ReferenceUpperLimit, BO.IsHistory, BO.HasHistory, BO.AbnormalityCode, 
BO.Entered 

-- DB USED: SCM 
FROM CV3ClientVisit CV 
JOIN CV3BasicObservation BO 
ON CV.GUID = BO.ClientVisitGUID 

WHERE CV.AdmitDtm BETWEEN @STARTDATE AND @ENDDATE 
AND CV.TypeCode = 'INPATIENT' 
AND BO.Value IS NOT NULL 
AND (BO.ItemName LIKE '%SODIUM LEVEL%' 
OR BO.ITEMNAME LIKE '%HEMOG%') 
)A 

--##  TABLE INSERTIONS  ## 
--########################################################################################### 
--## WHAT GETS PUT INTO TABLE 2 ## 
INSERT INTO @T2 
SELECT 
B.VisitIDCode, 
B.ClientDisplayName, 
B.IDCode, 
B.LOS, 
B.CurrentLocation, 
B.DischargeDisposition, 
B.ItemName, 
B.Value, 
B.ReferenceLowerLimit, 
B.ReferenceUpperLimit, 
B.IsHistory, 
B.HasHistory, 
B.AbnormalityCode, 
B.Entered 

FROM 
(
-- COLUMN SELECTION 
SELECT CV.VisitIDCode, CV.ClientDisplayName, CV.IDCode,DATEDIFF(DD,CV.ADMITDTM,CV.DISCHARGEDTM) AS 'LOS', 
CV.CurrentLocation,CV.DischargeDisposition, BO.ItemName, BO.Value,BO.ReferenceLowerLimit, BO.ReferenceUpperLimit, 
BO.IsHistory, BO.HasHistory, BO.AbnormalityCode,BO.Entered 

-- DB USED: SCM 
FROM CV3ClientVisit CV 
JOIN CV3BasicObservation BO 
ON CV.GUID = BO.ClientVisitGUID 


WHERE CV.AdmitDtm BETWEEN @STARTDATE AND @ENDDATE 
AND CV.TypeCode = 'INPATIENT' 
AND BO.Value IS NOT NULL 
AND (BO.ItemName LIKE '%SODIUM LEVEL%' 
OR BO.ITEMNAME LIKE '%HEMOG%') 
)B 

--########################################################################################### 
--## HERE IS WHERE WE DO TABLE COMPARISONS ## 

SELECT 
DISTINCT T1.ENCOUNTER, 
T1.PT_NAME AS 'PT NAME', T1.MRN AS 'MRN', T1.LOS AS 'LOS', T1.PT_LOC AS 'PT LOC', 
T1.PT_DISPO AS 'PT DISPO', T2.LAB_NAME2 AS 'LAB NAME', T2.LAB_VALUE2, T2.LOWER_LIMIT2 AS 'LOWER LIMIT', 
T2.UPPER_LIMIT2 AS 'UPPER LIMIT', T2.AB_CODE2 AS 'AB CODE', T2.ORDER_ENTERED2 

FROM @T1 T1 
JOIN @T2 T2 
ON T1.MRN = T2.MRN2 

WHERE 
T1.ENCOUNTER = T2.ENCOUNTER2 
AND T1.ORDER_ENTERED < T2.ORDER_ENTERED2 
AND T2.ORDER_ENTERED2 = (
         SELECT MAX(TEMP.ORDER_ENTERED2) 
         FROM @T2 TEMP 
         WHERE T1.MRN = TEMP.MRN2 
         ) 

結果

CLIENT ID VISIT ID  ARRIVE DATE  VALUE  DATE VALUE ORDERED 
....................................................................... 
1  |  1  |  1/1/13  | 5  | 1/1/13 
1  |  1  |  1/1/13  | 6  | 1/2/13 <- returned row 

如果此查詢將訂購的13年1月2日的日期值返回的行。

第二個查詢計算了我在Client ID列中的客戶端在12個月的時間範圍內有多少次。所以對於它上面將返回類似 查詢2：

-- VARIABLE DECLARATION 
DECLARE @STARTDATE DATETIME 
DECLARE @ENDDATE DATETIME 

-- INITIALIZE VARIABLES 
SET @STARTDATE = '6/1/12'; 
SET @ENDDATE = '1/1/13'; 

-- COLUMN SELECTION 
SELECT DISTINCT CV.IDCode AS 'MRN', COUNT(CV.IDCODE) AS 'COUNT OF IP VISITS' 

FROM CV3ClientVisit CV 

WHERE CV.AdmitDtm BETWEEN @STARTDATE AND @ENDDATE 
AND CV.TypeCode LIKE '%INPATIENT' 
AND CV.VisitStatus IN(
'ADM', 
'DSC' 
) 
GROUP BY CV.IDCode 
ORDER BY COUNT(CV.IDCode) DESC 

結果：訪問 的 客戶端ID計數..................... .......... 1 | 2

第三和最終的查詢告訴我，他們有多少次做了，例如

查詢3：

Declare @procedures Table (MRN varchar(20), Patient varchar(80), VisitID varchar(20), Admit datetime, Disch datetime, SurgProc varchar(200), ProcDesc varchar(200)) 
insert into @procedures 


select cv.IDCode,cv.ClientDisplayName,cv.VisitIDCode,AdmitDtm,cv.DischargeDtm,ed.Description,ed.text from CV3ClientVisit cv 
left join cV3ClientEventDeclaration ed 
    on cv.GUID=ed.ClientVisitGUID 
     where ed.typecode = 'Surgery' 
     and cv.AdmitDtm > '6/30/12' and cv.AdmitDtm <='1/1/13' 
     and Status = 'Active' 

    select visitid, COUNT(visitid)as '#Surg Procs' from @procedures 
     group by visitid 

結果：

CLIENT ID  VISIT ID  ARRIVE DATE  DEPART DATE  COUNT OF PR VISITS 
............................................................................... 
1   | 1   | 1/1/13  | 1/3/13  | 3 

所以我的問題是，如何我是否正確JOIN所有這些查詢在一起，以獲得只有一個結果？有些時候客戶可能沒有針對其中一項查詢的結果。

我想最終的頭看起來像這樣：

CLIENT ID | CLIENT VISIT ID | CLIENT NAME | LOS | PT LOC | PT DISPO | LAB NAME | LAB VALUE | LOWER LIMIT | UPPER LIMIT | AB CODE | COUNT OF IP VISITS | COUNT OF PROCEDURES  

謝謝

Answer 1

確定。我會給你一個提示。

假設你有兩個SELECT類型的查詢。

第一個返回：Last Name, First Name, Date of Birth。

二回報：Last Name, First Name, Address, Occupation

你想要結果爲：Last Name, First Name, Occupation, Date of Birth, Address

你會做這樣的事情：

SELECT LastName, FirstName, NULL,  DOB, NULL FROM ... 
UNION 
SELECT LastName, FirstName, Occupation, NULL, Address FROM ...