sql - 不存在的地方不工作 SQL Server 2008

Question

这是与此相关的问题，但使用 EXISTS 而不是 IN

SELECT distinct  Patient.patientid
FROM Patient P
JOIN patientICD pICD 
  ON P.patientid = pICD.patientid
  AND P.admissiondate = pICD.admissiondate
  AND P.dischargedate = pICD.dischargedate
JOIN tblICD 
  ON pICD.primarycode = tblICD.ICD_ID
WHERE  tblICD.descrip LIKE N'%diabetes%'
  AND patient.patientID not in (
         SELECT distinct Patient.patientid
         FROM Patient P
         JOIN patientICD pICD 
           ON P.patientid = pICD.patientid
           AND P.admissiondate = pICD.admissiondate
           AND P.dischargedate = pICD.dischargedate
         JOIN tblICD ON pICD.primarycode = tblICD.ICD_ID
         WHERE tblICD.icd_id =N'25000'
  ) 

此查询工作正常，但是当我尝试将另一个字段添加到我必须使用的选择表达式时WHERE EXISTS，以下查询返回 0 结果，而上述查询返回 130。我正在尝试将 tblicd.icd_id 字段添加到结果中从第一个查询设置，我做错了什么。

SELECT DISTINCT  Patient.patientid, tblicd.icd_id
FROM Patient
INNER JOIN patientICD 
  ON Patient.patientid = patientICD.patientid 
  AND Patient.admissiondate = patientICD.admissiondate 
  AND Patient.dischargedate = patientICD.dischargedate 
INNER JOIN tblICD 
  ON patientICD.primarycode = tblICD.ICD_ID
WHERE tblICD.descrip LIKE N'%TextOfNote%'
  and not exists (
      SELECT DISTINCT Patient.patientid, tblicd.icd_id
      FROM Patient
      INNER JOIN patientICD
        ON Patient.patientid = patientICD.patientid 
        AND Patient.admissiondate = patientICD.admissiondate 
        AND Patient.dischargedate = patientICD.dischargedate 
      INNER JOIN tblICD 
        ON patientICD.primarycode = tblICD.ICD_ID
      WHERE tblICD.icd_id = N'25000'
)

Answer 1

我没有针对你的架构运行这个，但试试这个

编辑...

SELECT DISTINCT  Patient.patientid, tblicd.icd_id
FROM Patient 
    INNER JOIN patientICD 
        ON Patient.patientid = patientICD.patientid 
        AND Patient.admissiondate = patientICD.admissiondate 
        AND Patient.dischargedate = patientICD.dischargedate 
    INNER JOIN tblICD 
        ON patientICD.primarycode = tblICD.ICD_ID
WHERE tblICD.descrip LIKE N'%TextOfNote%'
    AND tblICD.icd_id <> N'25000'

Answer 2

您有两个患者，patentICD，tblICD 在这里发挥作用.. 一个在主查询中，另一个在“不存在”中。尝试使用表别名。

SELECT X FROM TABLEA A
INNER JOIN TABLEB B
  ON A.ID = B.ID

您必须在“不存在”中引用主查询...密切注意“ON”连接条件和 where 子句。

WHERE     (tblICD.descrip LIKE N'%TextOfNote%') and not exists
(
SELECT    DISTINCT Patient.patientid, tblicd.icd_id
FROM         Patient INNER JOIN
 patientICD ON Patient.patientid = patientICD.patientid AND Patient.admissiondate = patientICD.admissiondate AND 
                      Patient.dischargedate = patientICD.dischargedate INNER JOIN
                      tblICD ON patientICD.primarycode = tblICD.ICD_ID
WHERE     (tblICD.icd_id = N'25000')
)