什么不存在不工作SQL Server 2008

Question

这是this的相关问题，但使用EXISTS代替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，但是当我尝试向select表达式添加另一个字段时，我必须使用WHERE EXISTS并且以下查询返回0结果，而上面的查询返回130.我正在尝试添加从第一个查询到结果集的tblicd.icd_id字段，我做错了。

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

我没有针对您的架构运行此操作，但请尝试一下

修改...

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

你有两个患者，患者ICD，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

你必须在“not exists”中引用主查询...密切关注“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')
)