2

我有一个病人表：

PatientId   Admitted
---------   ---------------
1           d/m/yy hh:mm:ss
2           d/m/yy hh:mm:ss
3           d/m/yy hh:mm:ss

我有一个 PatientMeasurement 表（0 到多个）：

PatientId   MeasurementId   Recorded            Value
---------   -------------   ---------------     -----
1           A               d/h/yy hh:mm:ss     100
1           A               d/h/yy hh:mm:ss     200
1           A               d/h/yy hh:mm:ss     300
2           A               d/h/yy hh:mm:ss     10
2           A               d/h/yy hh:mm:ss     20
1           B               d/h/yy hh:mm:ss     1
1           B               d/h/yy hh:mm:ss     2

我正在尝试创建一个类似于以下内容的结果集：

PatientId   Numerator   Denominator
---------   --------    -----------
1           1           1
2           1           1
3           0           1

本质上，如果患者具有至少一个测量 A 值和一个测量 B 值，则患者的分子将具有 1。在此示例中，患者 1 具有 3 个 A 测量值和 2 个 B 测量值，因此分子为 1。患者2 有 2 个 A 测量值，但没有 B 测量值，因此分子为 0。患者既没有 A 测量值也没有 B 测量值，因此分子为 0。

到目前为止，我的查询是：

SELECT  PatientId, CASE WHEN a.cnt+b.cnt>2 THEN 1 ELSE 0 END Numerator, 1 Denominator
FROM    patient p

LEFT OUTER JOIN (
    SELECT  PatientId, count(*) cnt
    FROM    PatientMeasurement pm
    WHERE   MeasurementId='A'
    --AND   Recorded <= dateadd(hh, 12, Admitted)
    GROUP BY PatientId
) a ON p.PatientId=a.PatientId

LEFT OUTER JOIN (
    SELECT  PatientId, count(*) cnt
    FROM    PatientMeasurement pm
    WHERE   MeasurementId='B'
    --AND   Recorded <= dateadd(hh, 12, Admitted)
    GROUP BY PatientId
) b ON p.PatientId=b.PatientId

只要我不包括相关的日期限制（Recorded < dateadd(hh, 12, Admitted)），这将按预期工作。不幸的是，以这种方式关联“内联视图”在语法上无效。

这迫使我将 SQL 重写为：

SELECT  PatientId, CASE WHEN v.a+v.b>2 THEN 1 ELSE 0 END Numerator, 1 Denominator
FROM    (

    SELECT  PatientId,
    (
        SELECT  PatientId, count(*) cnt
        FROM    PatientMeasurement pm
        WHERE   PatientId=p.PatientId
        AND MeasurementId='A'
        AND Recorded <= dateadd(hh, 12, Admitted)
        GROUP BY PatientId
    ) a,
    (
        SELECT  PatientId, count(*) cnt
        FROM    PatientMeasurement pm
        WHERE   PatientId=p.PatientId
        AND MeasurementId='B'
        AND Recorded <= dateadd(hh, 12, Admitted)
        GROUP BY PatientId
    ) b
    FROM    Patient p
) v

我的问题：有没有更好、更有效的方法来做到这一点？

谢谢你的时间。

4

5 回答 5

1

试试这个 ：

WITH GroupPatients AS 
    (SELECT MeasurementID, PatientId, Count(*) AS cnt
    FROM PatientMeasurement AS pm
    INNER JOIN Patient p ON pm.PatientID = p.PatientID
    WHERE
        MeasurementId IN ('A', 'B')
    AND
        Recorded <= dateadd(hh, 12, Admitted)
    GROUP BY MeasureMentID, PatientId)

SELECT p.PatientID, Case
    When IsNull(GPA.cnt, 0) > 0 AND IsNull(GPB.cnt, 0) > 0 Then 1
    Else 0
End AS Numerator, 1 AS Denominator
FROM Patient p
LEFT JOIN GroupPatientsA AS GPA ON p.PatientID = GPA.PatientID AND GPA.MeasurementID = 'A'
LEFT JOIN GroupPatientsB AS GPB ON p.PatientID = GPB.PatientID AND GPB.MeasurementID = 'B'

我也对业务逻辑进行了一次调整-您的规范说，如果患者同时具有 A 和 B 测量值，则 Numerator 应该是一个-但是，如果 a.cnt+b.cnt>2 的任何一个，您的子句将错误地返回一个.cnt 或 b.cnt 为 3 或更多，另一个为零。

于 2009-11-13T16:41:54.053 回答
1 
SELECT  p.*, 
        CASE WHEN
        EXISTS
        (
        SELECT  NULL
        FROM    PatientMeasurement pm
        WHERE   pm.PatientID = p.ID
                AND pm.Type = 'A'
                AND pm.Recorded <= DATEADD(hh, 12, p.Admitted)
        ) AND EXISTS (
        SELECT  NULL
        FROM    PatientMeasurement pm
        WHERE   pm.PatientID = p.ID
                AND pm.Type = 'B'
                AND pm.Recorded <= DATEADD(hh, 12, p.Admitted)
        ) THEN 1 ELSE 0 END
FROM    Patient p
于 2009-11-13T16:42:56.110 回答
1

另一个解决方案可以接近您最初的尝试，使用OUTER APPLY：

SELECT  PatientId, CASE WHEN a.cnt+b.cnt>2 THEN 1 ELSE 0 END Numerator, 1 Denominator 
FROM    patient p 
OUTER APPLY ( 
    SELECT      count(*) cnt 
    FROM        PatientMeasurement pm 
    WHERE       MeasurementId='A' 
    AND       Recorded <= dateadd(hh, 12, p.Admitted) 
    AND pm.PatientId = p.PatientId
) AS a(cnt)     
OUTER APPLY ( 
    SELECT      count(*) cnt 
    FROM        PatientMeasurement pm 
    WHERE       MeasurementId='B' 
    AND       Recorded <= dateadd(hh, 12, p.Admitted) 
    AND pm.PatientId = p.PatientId
) AS b(cnt)
于 2009-11-13T16:55:58.213 回答
0

假设您使用的是 Sql 2005 或 2008，则可以使用一些窗口函数和枢轴来简化整个查询：

with pData as
(
    select  count(*) over(partition by PatientId, MeasurementId) as cnt,
            PatientId, MeasurementId
    from    PatientMeasurement pm
    where   MeasurementId in('A','B')
    and     Recorded <= dateadd(hh, 12, Admitted)
)
select  PatientId, coalesce([A],0) as cntA, coalesce([B],0) as cntB,
        case when coalesce([A],0) + coalesce([B],0) > 2 then 1 else 0 end as Numerator,
        1 as Denominator
from    pData
pivot   (max(cnt) for MeasurementId in([A],[B])) pvt
于 2009-11-13T17:10:35.180 回答
0 
DECLARE @TimeSlot int;
SET @TimeSlot = 12;

WITH 
pt AS (
    SELECT p.PatientID, p.Admitted, m.MeasurementID, m.Recorded,
        CASE 
          WHEN m.Recorded <= dateadd(hh, @TimeSlot, p.Admitted) THEN 1 
          ELSE 0 
        END AS "InTimeSlot"
    FROM Patient AS p
    LEFT JOIN PatientMeasurement AS m ON p.PatientID = m.PatientID
),
cntA AS (
    SELECT PatientID, count(*) AS "A_count"
    FROM pt WHERE MeasurementID='A' AND InTimeSlot = 1
    GROUP BY PatientID
),
cntB AS (
    SELECT PatientID, count(*) AS "B_count"
    FROM pt WHERE MeasurementID='B' AND InTimeSlot = 1
    GROUP BY PatientID
),
cntAB AS (
    SELECT p.PatientID
          ,coalesce(a.A_count, 0) AS "A_cnt"
          ,coalesce(b.B_count, 0) AS "B_cnt"
    FROM Patient as p
    LEFT JOIN  cntA  AS a ON p.PatientID = a.PatientID
    LEFT JOIN  cntB  AS b ON p.PatientID = b.PatientID
),
cntN AS (
    SELECT PatientID,
        CASE WHEN A_cnt > 0 AND B_cnt > 0 THEN 1 ELSE 0 END AS Numerator
    FROM cntAB 
)
SELECT PatientID, Numerator, 1 AS Denominator FROM cntN
于 2009-11-13T17:29:42.990 回答